horizontal sleeve valve pipe
sleeve valve tube grouting method
Sleeve Valve Tube Grouting Technique
pressure reducing valve reducing valve
valve disc type breath valve
800 kV wall-through sleeve
adapter sleeve
接头套筒
适配套筒
定心套筒
紧固套
联结套管
连接套管
接装套筒
紧定套
紧固件
连接套
接头套
an innovative microsurgical blood vessel anastomosis sleeve
Anticollisive seel sleeve