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 - Wing air locks for travelling tracks - Double-wing type doors with pressure reduction
采矿用空气调节系统.移动轨道用翼式气锁.带减压的双翼式门

2016-09-01