Air regulating systems for mining - Wing air doors for haulage tracks - Double-wing type doors without pressure reduction
采矿用空气调节系统.运输轨道用翼式风门.无减压的双翼式风门

2011-03-01

Air regulation systems for mining - Belt-conveyors-way air locks - Dimensions, identifications, requirements and testing
采矿用空气调节系统.带式输送机通道空气锁.尺寸 标识 要求和试验

2016-09-01