一本大道道香蕉a高清_亚洲午夜福利av一区二区无码_又黑又长又粗欧美在线视频_97人妻在线视频网_老司机67194熟妇在线播_国产香蕉久久_heyzo加勒比中文字幕_欧美性生活视频网站_日本黃色三級片a做愛电影免费看_一级片好看中文字幕

No matter what mechanical equipment, waterproof should be noted，Polyurethane foaming machine Similarly, these machines are produced by generating electricity. If they enter the water, they will not only fail to operate properly, but also shorten the life of the machines.

1. Wear protective equipment when mixing two parts of the original liquid;

2. Good ventilation and sanitation in the working environment;

3. If the ambient temperature is very high, the group of liquid will be vaporized and there will be pressure. At this time, open the exhaust cover first, and then open the barrel cover after the gas pressure relief;

4、當Polyurethane foaming machine Added flame retardant should be used when foam is required to be flame retardant.

5, in the process of manual foaming must grasp the proportion;

6. When our skin comes into direct contact with the original liquid, wash immediately with soap and water. If it comes into contact with material B, wipe it off immediately with medical cotton.