The fireproof cover is formed by combining a firesealing and heat insulating device and a filter fume extractor.
防火罩由封火保温装置和过滤排烟装置两部分组合成。
2
First of all the most important point: if the gas pipeline inner fire, immediately closed all into the hole, radiation tube and sealing pipe, and in general to pipe of steam to extinguish fire.