999精品无码a片在线1级_精品国产不卡一区_久久精品无码天堂av好看到停不下来！_日本免费高清视频网站_2024av在线无码中文最新_韩国黄漫在线观看_福利美女视频国产自产_日韩写真专区午夜福利电影_人妻永久不做被粗大迎合_黄色一级毛片视频看

China Website

Home > FAQ

	Services
	Services
	FAQ
	Applications

	FAQ

	What does the zone in the explosion-proof level mean?

	Gas explosion environment: Zone 0: Permanent or prolonged presence of explosive gases Zone 1: Occasional occurrence of explosive gases Zone 2: Only a small amount of explosive gas appears in a short period of time Dust explosion environment: Zone 20: Permanent or prolonged presence of explosive dust Zone 21: Occasional occurrence of explosive dust Zone 22: Only a small amount of explosive dust appears in a short period of time

Copyright ©2020 Suzhou Rahler

蘇ICP備15057136號(hào)

蘇公網(wǎng)安備32050502000264號(hào)