double in-let and double out-let coal mill
800 kV wall-through sleeve
adapter sleeve
紧固件
定心套筒
连接套
连接套管
紧固套
接装套筒
联结套管
接头套筒
适配套筒
紧定套
接头套
alighting carriage guide sleeve
aluminum retaining sleeve
amount of sliting sleeve head
an innovative microsurgical blood vessel anastomosis sleeve
angle of tapered sleeve
Anticollisive seel sleeve
apparatus porcelain sleeve