亚洲精品鲁一鲁一区二区三区-最爽无遮挡行房视频-强壮的公次次弄得我高潮A片日本-精品人妻无码一区二区三区换脸-中文字幕亚韩-亚洲国产精品一区二区第一页-丰满岳乱妇一区二区三区-大陆极品少妇内射AAAAAA-国产乱人伦AV麻豆网-AV国産精品毛片一区二区三区-午夜精品视频在线无码-免费精品一区二区三区A片在线-在线天堂无限次观看,久久久久亚洲精品,欧美日韩性生活片,麻豆天美精东蜜桃传,韩日一级黄色片,高辣文黄暴糙汉文文,亚州一射区,狠狠综合久久综合88亚洲,免费看污又色又爽又黄的小说,在线久色,无码一区二区三区蜜桃大,三级大片,免费无码又爽又刺激片涩涩直播,久艾草久久综合精品无码国,国产色情无码永久免费软件,肥伴老妇水多乳大小说,久久国产色情爽翻爽翻,怡春院在线视频,国产精品久久久爽爽爽麻豆色哟哟 ,久久久WWW成人免费精品,在线观看私密高清无码,亚洲午夜无码伦在线观看,亚洲毛片,五月天国产成人在线,天美精品国产自产在线,色熟妇人妻久久中文字幕,日韩精品无码久久久久成人,日本欧美在线高清,人妻在卧室被老板疯狂进入国产,人妖欧美一区二区三区四区,日本免费理论片

A healthy and safe work environment is crucial for improving work efficiency. Especially in laboratories, the use of various chemical substances often causes air pollution. Some substances not only smell bad, but are even harmful to health. Naturally, how to choose an appropriate ventilation device has become a topic that cannot be ignored in various laboratories. How to select ventilation ducts and Fume hood in laboratory? The ventilation duct manufacturer will explain to you:

造成實驗室空氣污染的主要原因就是在各種實驗中散發的氣體、煙霧和灰塵顆粒物。在英國，化學和有害物質的使用，被置于“有害物質使用管理規定”（C。O。S。H。H）的管理之下，COSHH規定，在實驗室，任何可能造成空氣污染的物質的使用都要在實驗室通風柜內進行。有一臺好的通風柜，必能達到事半功倍的效果。那么如何才能選擇到一臺好的通風柜呢？通風柜的好壞單從表面是看不出來的，須從它的內部進行解析：

The main cause of laboratory air pollution is the emission of gases, smoke, and dust particles in various experiments. In the UK, the use of chemicals and hazardous substances is under the management of the "Management Regulations on the Use of Hazardous Substances" (C. O. S. H. H). COSHH stipulates that any substance that may cause air pollution in the laboratory must be used in the laboratory Fume hood. With a good Fume hood, you can get twice the result with half the effort. So how can we choose a good Fume hood? The quality list of Fume hood cannot be seen from the surface, but must be analyzed from its interior:

1、保證通風柜內的氣體、煙霧和灰塵顆粒特不泄露于室內空氣中。

1. Ensure that the gas, smoke and dust particles in the Fume hood will not leak into the indoor air.

2、可燃氣體在通風柜內不聚集。

2. Combustible gas will not gather in the Fume hood.

3、保證實驗室工作人員在通風櫥前工作時，不受有害物質的侵害，萬一玻璃門破裂時不被碎玻璃劃傷。

3. Ensure that laboratory staff are not harmed by harmful substances when working in front of the fume hood, and avoid being scratched by broken glass in case the glass door breaks.

4、所選通風柜有（國家）安全認證，設計符合人體工程學原理。

4. The selected Fume hood has international (national) safety certification, and its design conforms to ergonomic principles.

5、通風柜導流板設計是非常重要的，好的導流板設計能使空氣排放流暢，避免煙氣積存。對于一般性的實驗，通風柜表面網速不少于0。5m/s，而進行一些散發灰塵顆粒物的操作，表面網速則達到0。75m/s。

5. The design of Fume hood deflector is very important. A good deflector design can make the air discharge smooth and avoid smoke accumulation. For general experiments, the surface network speed of Fume hood shall not be less than 0. 5m/s, while performing some operations that emit dust particles, the surface network speed reaches 0. 75m/s.

6、通風柜的水、電、氣路裝置均備，設計靈活，以免給用戶帶來不便和煩惱。

6. The water, electricity and air circuit devices of the Fume hood are all available, and the design is flexible to avoid inconvenience and trouble to users.

本文由濟南通風管道友情奉獻.更多有關的知識請點擊: http://www.gaoyouwenhua.com   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 dedicated by Jinan Ventilation Pipeline Friendship. For more relevant knowledge, please click on: http://www.gaoyouwenhua.com Sincere attitude. We will provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Stay tuned