侧抽油缸
Side-pulling Hydraulic Cylinder
边掘边抽
Inhaling as Tunneling
driving and drainage at same time
drainage with the advance of excavation
joint excavation and gas drainage
边抽边掘
executing-digging
joint excavation and gas drainage
冰箱抽盒
Numerical simulation analysis
边界电流之抽移
boundary current blinding out
拔盐抽碱
Eliminate the saline and alkaline