日韩欧美在线一区 I 丝袜老师让我了一夜网站 I 久草免费网站 I 超碰五月天 I 男人天堂avav I 五月婷婷一区 I 扒开女人双腿猛进入爽爽视频 I 欧美日韩国产第一页 I 中文无码日韩欧 I 久久男人视频 I 午夜久久久 I 韩国vip19福利视频 I 色婷婷国产 I 日韩一区二区三区视频 I 国产精品成人Av I 欧美日韩一区二区三区 I 蜜桃91丨九色丨蝌蚪91桃色 I 亚洲爆爽av I 激情午夜婷婷 I 黄页在线播放 I 国产精品videossex I 亚洲欧洲无码av不卡在线 I 中文一区在线播放 I 91 亚洲一区 I 666视频 I 亚洲一区影音先锋 I 色网直播在线观看 I 含羞草www国产在线视频 I 国产福利一区二区三区视频在线 I www.avtt天堂网 I 美女张开腿喷水高潮 I 亚洲美女天堂网 I 日本一级大黄爱做片 I 国产精品宾馆国内精品酒店 I 毛片av一区二区 I 人妻少妇偷人无码视频 I 97在线无码免费人妻短视频 I 亚洲欧美色婷婷 I 久久综合九色综合97网

 歡迎訪問濟南科爾超聲波設備有限公司網站!

專注生產工業用超聲波清洗機

讓工業清洗無難事

電話

業務咨詢電話:

18663767799

你所在位置: 首頁-新聞動態-新聞資訊
新聞資訊

超聲波清洗機:實驗室用超聲波清洗器,如何選購?

作者:創始人來源:http://www.heqingliang.cn/時間:2025-09-08

  實驗室的很多儀器工件都需要保持潔凈干燥,才能保證測量結果準確、保證儀器使用壽命。曾幾何時,實驗室的研究員們每次用完儀器工件都要苦哈哈的“刷儀器”,不過現在大部分的清潔工作都可以用超聲波清洗器來解決了。

  Many instruments and workpieces in the laboratory need to be kept clean and dry to ensure accurate measurement results and longevity of the instruments. Once upon a time, laboratory researchers would have to "brush" their instruments and workpieces every time they used them, but now most cleaning work can be solved with ultrasonic cleaners.

  使用超聲波清洗器清洗工件,清洗速度快,清潔效果好,無須人手接觸清洗液,安全可靠,還節約溶劑、場地和人工。其廣泛的適用于電子元器件、磁性材料、五金工具、玻璃器皿等多種工件。而且,超聲波清洗器在實驗室中還可做提取、乳化、脫氣、均勻、細胞粉碎之用。可以說,沒有超聲波清洗器的實驗室是不完整的。那么如何選擇一款性價比高的超聲波清洗器呢?

  Using an ultrasonic cleaner to clean workpieces has fast cleaning speed, good cleaning effect, no need for manual contact with cleaning solution, is safe and reliable, and also saves solvents, space, and labor. It is widely applicable to various workpieces such as electronic components, magnetic materials, hardware tools, glassware, etc. Moreover, ultrasonic cleaners can also be used for extraction, emulsification, degassing, homogenization, and cell crushing in the laboratory. It can be said that a laboratory without an ultrasonic cleaner is incomplete. So how to choose a cost-effective ultrasonic cleaner?

  小編走訪了很多超聲波清洗器廠家,整理出這份“超聲波清洗器采購指南”,現在免費分享給你啦~

  The editor has visited many ultrasonic cleaner manufacturers and compiled this "Ultrasonic Cleaner Procurement Guide", which is now shared with you for free~

  Part.1

  Part.1

  你要洗啥?

  What do you want to wash?

  小編曾多次強調,選購實驗室儀器設備前,最重要的是摸清自我需求。超聲波清洗器的采購也不例外。購買超聲波清洗器前,先考慮這幾個問題:

  The editor has repeatedly emphasized that before purchasing laboratory equipment, the most important thing is to understand one's own needs. The procurement of ultrasonic cleaners is no exception. Before purchasing an ultrasonic cleaner, consider these questions:

  (1)清洗物的外形大小、材質、數量

  (1) The appearance, size, material, and quantity of the cleaning material

  你要清洗的工件是什么材質的?其形狀結構和尺寸大小是多少?每次需要清洗幾件?

  What material is the workpiece you want to clean? What is its shape, structure, and size? How many items do I need to clean each time?

  (2)需要清洗的污物是什么

  (2) What are the pollutants that need to be cleaned

  你要清洗掉工件上的什么污物?是灰塵、油脂,還是沖壓拉升油脂、拋光臘、積炭?

  What kind of dirt do you want to clean off the workpiece? Is it dust, grease, or stamping and pulling grease, polishing wax, or carbon deposits?

  (3)清洗物適合什么超聲頻率?

  (3) What ultrasonic frequency is suitable for cleaning materials?

  如果是大型的工件且精密度要求比較低的,可以選擇低頻超聲波。而電子元件或者電路板這種對精度要求比較高且害怕損傷的物品,選擇高頻超聲波甚至兆赫級的超聲波。

  If it is a large workpiece with low precision requirements, low-frequency ultrasound can be chosen. For electronic components or circuit boards that require high precision and are afraid of damage, high-frequency ultrasonic waves or even megahertz level ultrasonic waves are preferred.

  (4)清洗時長是多長?

  (4) How long is the cleaning time?

  如果你只是偶爾短時間的對工件進行超聲波清洗,可以購買價格稍便宜的小型超聲波清洗器。如果超聲波清洗器使用頻率較高,每次清洗工作時長較長,建議購買工業或實驗室超聲波清洗器。這類超聲波清洗器在設計和制造工藝上都比較優秀,使用壽命也更長,能夠保證長時間的持續運行。

  If you only occasionally clean the workpiece with ultrasonic waves for a short period of time, you can purchase a slightly cheaper small ultrasonic cleaner. If the ultrasonic cleaner is used frequently and the cleaning time is long, it is recommended to purchase an industrial or laboratory ultrasonic cleaner. This type of ultrasonic cleaner has excellent design and manufacturing processes, and a longer service life, ensuring long-term continuous operation.

  Part.2

  Part.2

  選購要點

  Key points for purchasing

  明確了需求后,就是根據需求來選擇合適的產品了。小編提醒您注意以下幾個方面:

  After clarifying the requirements, it is time to choose the appropriate product based on the needs. The editor reminds you to pay attention to the following aspects:

  (1)清洗槽的尺寸和材質

  (1) Size and material of cleaning tank

  清洗槽材質要根據清洗介質的化學特性來確定,最常用的是SUS304不銹鋼,如果使用環境較惡劣,則可選擇SUS316材質。

  The material of the cleaning tank should be determined based on the chemical properties of the cleaning medium. The most commonly used material is SUS304 stainless steel. If the usage environment is harsh, SUS316 material can be chosen.

  清洗槽的尺寸要根據所清洗物品的外形尺寸、數量來確定最小的有效容積。另外還要注意清洗籃網眼的大小,在清洗小零件物品時,常使用網籃,由于網眼要引起超聲衰減,當頻率為28khz時使用10mm以上的網眼為好。

  The size of the cleaning tank should be determined based on the external dimensions and quantity of the items being cleaned to determine the minimum effective volume. Additionally, it is important to pay attention to the size of the mesh in the cleaning basket. When cleaning small items, a mesh basket is often used. Due to the ultrasonic attenuation caused by the mesh, it is better to use a mesh size of 10mm or more when the frequency is 28kHz.

  (2)功率頻段的選擇

  (2) Selection of power frequency band

  超聲波清洗器功率的強弱對清洗效果影響很大。超聲波清洗器的頻率一般在20kHz到100kHz的范圍內,在使用水或者水清洗液的時候顯然使用低頻會更有效,常規的清洗頻率選擇為28KHZ和40KHZ比較多,對工件表面要求極微小的顆粒及表面不允許損傷的才選用較高的頻率。洗精密的零件可以選擇40至60KHZ頻率段。

  The strength of the power of the ultrasonic cleaner has a significant impact on the cleaning effect. The frequency of ultrasonic cleaning equipment is generally in the range of 20kHz to 100kHz. When using water or water cleaning solution, it is obvious that using low frequency will be more effective. The conventional cleaning frequency is more commonly selected as 28KHZ and 40KHZ, and higher frequencies are only used for workpieces that require extremely small particles on the surface and do not allow surface damage. Precision parts can be washed in the frequency range of 40 to 60KHZ.

  (3)清洗工藝相關功能

  (3) Cleaning process related functions

  根據要清洗的工件的材質、污物性質來決定使用什么清洗方法。大多數清洗液中的化學成分都會在一定溫度下達到最佳清潔效果,所以加熱功能是必不可少的。此外,超聲波清洗器與清洗工藝相關的功能有:設定超聲工作時間、超聲功率、加熱溫度等。

  Determine the cleaning method based on the material of the workpiece to be cleaned and the nature of the dirt. The chemical components in most cleaning solutions achieve optimal cleaning results at a certain temperature, so heating function is essential. In addition, the ultrasonic cleaner has functions related to the cleaning process, such as setting the ultrasonic working time, ultrasonic power, heating temperature, etc.

  (4)其他功能

  (4) Other functions

  滿足基礎需求的功能之外,再考慮其他功能的選擇。比如是否有觸控面板,是否有靜音功能,手動、半自動還是全自動,一體式還是分體式?

  In addition to meeting the basic requirements, consider the selection of other functions. For example, is there a touch panel, is there a mute function, manual, semi-automatic or fully automatic, integrated or split?

  一般來說,手動清洗器適合工序簡單的小量清洗操作。半自動適合大型重物或者中大批量的清洗;全自動清洗質量穩定、效果好,但設備成本較高,適合大批量清洗。

  Generally speaking, manual cleaners are suitable for small-scale cleaning operations with simple processes. Semi automatic is suitable for cleaning large heavy objects or medium to large quantities; Fully automatic cleaning has stable quality and good effect, but the equipment cost is high and suitable for large-scale cleaning.

  一體式臺式機體積較小,比較節約空間。多槽超聲波清洗器則常常將發生器分離出來,讓其遠離潮濕的清洗環境,多槽超聲波清洗器常常是根據使用單位的實際情況量身定做的。

  The all-in-one desktop computer has a smaller volume and is more space saving. Multi slot ultrasonic cleaners often separate the generator and keep it away from humid cleaning environments. Multi slot ultrasonic cleaners are often customized according to the actual situation of the user.

  (5)清洗液的選擇

  (5) Selection of cleaning solution

  除了超聲波清洗器,你還要根據要清洗工件的材質和污物的性質來選擇合適的清洗劑。清洗劑分為有機溶劑類和水基類的清洗劑。

  In addition to ultrasonic cleaners, you also need to choose the appropriate cleaning agent based on the material of the workpiece to be cleaned and the nature of the dirt. Cleaning agents are divided into organic solvents and water-based cleaning agents.

  清洗劑應安全無毒、操作簡單、清洗銷量高且使用壽命長。使用溶劑類清洗劑時常需要配備廢液連續回收裝置。

  Cleaning agents should be safe, non-toxic, easy to operate, have high cleaning sales, and long service life. It is often necessary to equip a waste liquid continuous recovery device when using solvent based cleaning agents.

  根據需求和功能對超聲波清洗器進行篩選之后,剩下的就是在可選擇的范圍內選一臺品牌和價格都合適的產品了。在選擇品牌時,小編建議您優先選擇專業從事超聲波清洗設備的廠家,最好是從業時間長、業內口碑好的廠家,售后服務體系是否完備也很重要。

  After screening the ultrasonic cleaner based on requirements and functions, the remaining step is to select a product from the available range that is suitable in terms of brand and price. When choosing a brand, Soko recommends that you prioritize manufacturers specializing in ultrasonic cleaning equipment, preferably those with long experience and good reputation in the industry. Whether the after-sales service system is complete is also important.

  本文由 超聲波清洗機  友情奉獻.更多有關的知識請點擊  http://www.heqingliang.cn/   真誠的態度.為您提供為全面的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

  This article is a friendly contribution from an ultrasonic cleaning machine For more related knowledge, please click http://www.heqingliang.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.實驗室的很多儀器工件都需要保持潔凈干燥,才能保證測量結果準確、保證儀器使用壽命。曾幾何時,實驗室的研究員們每次用完儀器工件都要苦哈哈的“刷儀器”,不過現在大部分的清潔工作都可以用超聲波清洗器來解決了。

  Many instruments and workpieces in the laboratory need to be kept clean and dry to ensure accurate measurement results and longevity of the instruments. Once upon a time, laboratory researchers would have to "brush" their instruments and workpieces every time they used them, but now most cleaning work can be solved with ultrasonic cleaners.

  使用超聲波清洗器清洗工件,清洗速度快,清潔效果好,無須人手接觸清洗液,安全可靠,還節約溶劑、場地和人工。其廣泛的適用于電子元器件、磁性材料、五金工具、玻璃器皿等多種工件。而且,超聲波清洗器在實驗室中還可做提取、乳化、脫氣、均勻、細胞粉碎之用。可以說,沒有超聲波清洗器的實驗室是不完整的。那么如何選擇一款性價比高的超聲波清洗器呢?

  Using an ultrasonic cleaner to clean workpieces has fast cleaning speed, good cleaning effect, no need for manual contact with cleaning solution, is safe and reliable, and also saves solvents, space, and labor. It is widely applicable to various workpieces such as electronic components, magnetic materials, hardware tools, glassware, etc. Moreover, ultrasonic cleaners can also be used for extraction, emulsification, degassing, homogenization, and cell crushing in the laboratory. It can be said that a laboratory without an ultrasonic cleaner is incomplete. So how to choose a cost-effective ultrasonic cleaner?

  小編走訪了很多超聲波清洗器廠家,整理出這份“超聲波清洗器采購指南”,現在免費分享給你啦~

  The editor has visited many ultrasonic cleaner manufacturers and compiled this "Ultrasonic Cleaner Procurement Guide", which is now shared with you for free~

  Part.1

  Part.1

  你要洗啥?

  What do you want to wash?

  小編曾多次強調,選購實驗室儀器設備前,最重要的是摸清自我需求。超聲波清洗器的采購也不例外。購買超聲波清洗器前,先考慮這幾個問題:

  The editor has repeatedly emphasized that before purchasing laboratory equipment, the most important thing is to understand one's own needs. The procurement of ultrasonic cleaners is no exception. Before purchasing an ultrasonic cleaner, consider these questions:

  (1)清洗物的外形大小、材質、數量

  (1) The appearance, size, material, and quantity of the cleaning material

  你要清洗的工件是什么材質的?其形狀結構和尺寸大小是多少?每次需要清洗幾件?

  What material is the workpiece you want to clean? What is its shape, structure, and size? How many items do I need to clean each time?

  (2)需要清洗的污物是什么

  (2) What are the pollutants that need to be cleaned

  你要清洗掉工件上的什么污物?是灰塵、油脂,還是沖壓拉升油脂、拋光臘、積炭?

  What kind of dirt do you want to clean off the workpiece? Is it dust, grease, or stamping and pulling grease, polishing wax, or carbon deposits?

  (3)清洗物適合什么超聲頻率?

  (3) What ultrasonic frequency is suitable for cleaning materials?

  如果是大型的工件且精密度要求比較低的,可以選擇低頻超聲波。而電子元件或者電路板這種對精度要求比較高且害怕損傷的物品,選擇高頻超聲波甚至兆赫級的超聲波。

  If it is a large workpiece with low precision requirements, low-frequency ultrasound can be chosen. For electronic components or circuit boards that require high precision and are afraid of damage, high-frequency ultrasonic waves or even megahertz level ultrasonic waves are preferred.

  (4)清洗時長是多長?

  (4) How long is the cleaning time?

  如果你只是偶爾短時間的對工件進行超聲波清洗,可以購買價格稍便宜的小型超聲波清洗器。如果超聲波清洗器使用頻率較高,每次清洗工作時長較長,建議購買工業或實驗室超聲波清洗器。這類超聲波清洗器在設計和制造工藝上都比較優秀,使用壽命也更長,能夠保證長時間的持續運行。

  If you only occasionally clean the workpiece with ultrasonic waves for a short period of time, you can purchase a slightly cheaper small ultrasonic cleaner. If the ultrasonic cleaner is used frequently and the cleaning time is long, it is recommended to purchase an industrial or laboratory ultrasonic cleaner. This type of ultrasonic cleaner has excellent design and manufacturing processes, and a longer service life, ensuring long-term continuous operation.2

  Part.2

  Part.2

  選購要點

  Key points for purchasing

  明確了需求后,就是根據需求來選擇合適的產品了。小編提醒您注意以下幾個方面:

  After clarifying the requirements, it is time to choose the appropriate product based on the needs. The editor reminds you to pay attention to the following aspects:

  (1)清洗槽的尺寸和材質

  (1) Size and material of cleaning tank

  清洗槽材質要根據清洗介質的化學特性來確定,最常用的是SUS304不銹鋼,如果使用環境較惡劣,則可選擇SUS316材質。

  The material of the cleaning tank should be determined based on the chemical properties of the cleaning medium. The most commonly used material is SUS304 stainless steel. If the usage environment is harsh, SUS316 material can be chosen.

  清洗槽的尺寸要根據所清洗物品的外形尺寸、數量來確定最小的有效容積。另外還要注意清洗籃網眼的大小,在清洗小零件物品時,常使用網籃,由于網眼要引起超聲衰減,當頻率為28khz時使用10mm以上的網眼為好。

  The size of the cleaning tank should be determined based on the external dimensions and quantity of the items being cleaned to determine the minimum effective volume. Additionally, it is important to pay attention to the size of the mesh in the cleaning basket. When cleaning small items, a mesh basket is often used. Due to the ultrasonic attenuation caused by the mesh, it is better to use a mesh size of 10mm or more when the frequency is 28kHz.

  (2)功率頻段的選擇

  (2) Selection of power frequency band

  超聲波清洗器功率的強弱對清洗效果影響很大。超聲波清洗器的頻率一般在20kHz到100kHz的范圍內,在使用水或者水清洗液的時候顯然使用低頻會更有效,常規的清洗頻率選擇為28KHZ和40KHZ比較多,對工件表面要求極微小的顆粒及表面不允許損傷的才選用較高的頻率。洗精密的零件可以選擇40至60KHZ頻率段。

  The strength of the power of the ultrasonic cleaner has a significant impact on the cleaning effect. The frequency of ultrasonic cleaning equipment is generally in the range of 20kHz to 100kHz. When using water or water cleaning solution, it is obvious that using low frequency will be more effective. The conventional cleaning frequency is more commonly selected as 28KHZ and 40KHZ, and higher frequencies are only used for workpieces that require extremely small particles on the surface and do not allow surface damage. Precision parts can be washed in the frequency range of 40 to 60KHZ.

  (3)清洗工藝相關功能

  (3) Cleaning process related functions

  根據要清洗的工件的材質、污物性質來決定使用什么清洗方法。大多數清洗液中的化學成分都會在一定溫度下達到最佳清潔效果,所以加熱功能是必不可少的。此外,超聲波清洗器與清洗工藝相關的功能有:設定超聲工作時間、超聲功率、加熱溫度等。

  Determine the cleaning method based on the material of the workpiece to be cleaned and the nature of the dirt. The chemical components in most cleaning solutions achieve optimal cleaning results at a certain temperature, so heating function is essential. In addition, the ultrasonic cleaner has functions related to the cleaning process, such as setting the ultrasonic working time, ultrasonic power, heating temperature, etc.

  (4)其他功能

  (4) Other functions

  滿足基礎需求的功能之外,再考慮其他功能的選擇。比如是否有觸控面板,是否有靜音功能,手動、半自動還是全自動,一體式還是分體式?

  In addition to meeting the basic requirements, consider the selection of other functions. For example, is there a touch panel, is there a mute function, manual, semi-automatic or fully automatic, integrated or split?

  一般來說,手動清洗器適合工序簡單的小量清洗操作。半自動適合大型重物或者中大批量的清洗;全自動清洗質量穩定、效果好,但設備成本較高,適合大批量清洗。

  Generally speaking, manual cleaners are suitable for small-scale cleaning operations with simple processes. Semi automatic is suitable for cleaning large heavy objects or medium to large quantities; Fully automatic cleaning has stable quality and good effect, but the equipment cost is high and suitable for large-scale cleaning.

  一體式臺式機體積較小,比較節約空間。多槽超聲波清洗器則常常將發生器分離出來,讓其遠離潮濕的清洗環境,多槽超聲波清洗器常常是根據使用單位的實際情況量身定做的。

  The all-in-one desktop computer has a smaller volume and is more space saving. Multi slot ultrasonic cleaners often separate the generator and keep it away from humid cleaning environments. Multi slot ultrasonic cleaners are often customized according to the actual situation of the user.

  (5)清洗液的選擇

  (5) Selection of cleaning solution

  除了超聲波清洗器,你還要根據要清洗工件的材質和污物的性質來選擇合適的清洗劑。清洗劑分為有機溶劑類和水基類的清洗劑。

  In addition to ultrasonic cleaners, you also need to choose the appropriate cleaning agent based on the material of the workpiece to be cleaned and the nature of the dirt. Cleaning agents are divided into organic solvents and water-based cleaning agents.

  清洗劑應安全無毒、操作簡單、清洗銷量高且使用壽命長。使用溶劑類清洗劑時常需要配備廢液連續回收裝置。

  Cleaning agents should be safe, non-toxic, easy to operate, have high cleaning sales, and long service life. It is often necessary to equip a waste liquid continuous recovery device when using solvent based cleaning agents.

  根據需求和功能對超聲波清洗器進行篩選之后,剩下的就是在可選擇的范圍內選一臺品牌和價格都合適的產品了。在選擇品牌時,搜科建議您優先選擇專業從事超聲波清洗設備的廠家,最好是從業時間長、業內口碑好的廠家,售后服務體系是否完備也很重要。

  After screening the ultrasonic cleaner based on requirements and functions, the remaining step is to select a product from the available range that is suitable in terms of brand and price. When choosing a brand, Soko recommends that you prioritize manufacturers specializing in ultrasonic cleaning equipment, preferably those with long experience and good reputation in the industry. Whether the after-sales service system is complete is also important.

  本文由 超聲波清洗機  友情奉獻.更多有關的知識請點擊  http://www.heqingliang.cn/   真誠的態度.為您提供為全面的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

  This article is a friendly contribution from an ultrasonic cleaning machine For more related knowledge, please click http://www.heqingliang.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.

主站蜘蛛池模板: 日韩免费a | 欧美精品在欧美一区二区少妇 | 图片区小说区视频区 | 五十路熟女丰满大屁股 | 德国av | 天天综合亚洲综合网天天αⅴ | 久久精品中文字幕无码绿巨人 | 亚洲一区二区三区中文字幕 | 日日嗨av一区二区三区四区 | 日本翁妇免费视频 | 欧美专区亚洲 | 丰满白嫩人妻中出无码 | 双乳被老汉揉搓a毛片免费观看 | 一本色道久久综合狠狠躁篇 | 亚洲逼图 | 亚洲国产成人久久综合一区 | 国产一级理论 | 91超碰成人 | 亚洲精品成人无码中文毛片不卡 | 无码中文字幕在线播放2 | 欧美激情专区 | 欧美一级特黄aa大片 | 乱码一区二区三区 | 欧洲亚洲精品久久久久 | 少妇人妻无码精品视频app | 亚洲女人毛耸耸 | 国产成网站18禁止久久影院 | 99大香伊乱码一区二区 | 日韩精品视频免费在线观看 | 狠狠躁夜夜躁人人躁婷婷视频 | 精品蜜臀av在线天堂 | 2020狠狠狠狠久久免费观看 | 天天天天天干 | 日韩第一色 | 国产天天综合 | 男人撕开奶罩揉吮奶头视频 | 国产午夜aaaaa片在线影院 | 亚洲国产精品va在线观看麻豆 | 青青草免费观看视频 | 精品国产亚洲福利一区二区 | 欧美日a | 国产精品裸体瑜伽视频 | 欧美国产日本高清不卡 | 亚洲国产av天码精品果冻传媒 | 人妻有码av中文字幕久久琪 | 久久精品九九亚洲精品 | 亚洲乱码尤物193yw最新网站 | 老司机精品视频一区二区三区 | 午夜福利小视频400 亚洲国产一区二区精品 | 又爽又黄禁片视频1000免费 | 精品国产一二区 | 国产午夜高潮熟女精品av | 日本熟妇人妻xxxxx视频 | 国产吞精囗交免费视频 | 亚洲日韩欧美一区二区三区 | 91丨porny丨在线| 夜夜操网 | av免费观看网站 | 久久国内精品自在自线图片 | 六十路熟妇乱子伦 | 久久午夜场 | aaaaaa亚洲| 中日韩精品卡一卡二卡3卡 日韩一级一区 | 在线观看你懂的网址 | 婷婷色婷婷开心五月四房播播久久 | 久久久久国产精品午夜一区 | 亚洲の无码国产の无码影院 | 嫩草影视入口 | 国产av一区二区三区日韩 | 国产在线成人一区二区三区 | 狼人综合色 | 网址你懂的在线观看 | 中国视频一区二区 | av一二三区| 亚洲色图色小说 | 在线精品亚洲一区二区绿巨人 | 久久久亚洲国产美女国产盗摄 | 日本最新高清一区二区三 | 免费网站看v片在线a | 亚洲天天干 | 最新亚洲人成网站在线影院 | 特黄视频在线观看 | 老熟妇高潮一区二区三区 | 天天躁夜夜躁狠狠是什么心态 | 日本欧美一本 | 国产精品久久久一区二区 | 亚洲午夜av久久久精品影院 | 人妻无码中文专区久久app | 2022国产日产欧产精品 | 中文字幕亚洲精品乱码 | 伊人一级| 男人的天堂av片 | 欧美片| 伊人久久久久久久久久久久久 | 国产又色又爽无遮挡免费软件 | 精品无码一区二区三区爱欲九九 | 国产精品入口66mio | 四虎av在线播放 | 中国毛片在线 |