亚洲一级黄色片I天天干夜夜操视频I久久久久久久久久久久电影I国产精品久久久久一区二区三区I国产黄色精品网站I国产手机免费视频

Brief introduction：

◎ Explosion-proof Unitary air conditioner of Knexcn is explosion-proof electrical product certified by IECEx / ATEX / EAC / CHINA and used for Zone 1 , Z o n e 2 , Z o n e 2 1 , Z o n e 2 2 , I I A , I I B , IIC,IIIA,IIIB,IIIC class, T1 ~ T4 group. 

◎Applicable to control room, driller room, workshop, hazardous goods warehouse in petroleum, chemical, military, power utility, marine engineering and other fields where flammable gas or vapor may react with air to form explosive gas mixture in a normal operation.