爱逼综合网-久久免费视频2-亚洲少妇xxxx-成年人免费公开视频-一级的大片-国产亚洲精品成人av久久影院-欧美精品二区+ftped2k-日韩AV在线电影网站-日本公与妇电影三级2,强乱中文字幕av一区乱码,欧美在线看片a免费观看,亚洲精品三级在线观看

Quality standard:

Character:  
Colorless inflammable gas, low toxicity gas
To use:  
In semiconductor industry, it is used by mixing with oxygen gas as plasma etching material; in medical industry, it is used as ultrasonic contrast agent; in R-218, it is used as ingredient of refrigeration mixture.
Storage:  
Should be preserved in cool and ventilated non-flammable gas used warehouse under temperature no higher than 30℃; keep it away from fire and heat source; separate with oxidizing agent; please prepare emergency processing facilities.
Transportation:  
Up to standards of gas cylinder safety supervision regulations
Storage:  
In special handling clean and dry gas cylinder; volume is 40L, 12.5L, 10L, 8L, 4L or on customer demands