cementing casing head
注水泥套管头
stuffing box casing head
盘根盒式套管头
Design and Application of New Type Fast Makeup Casing Head
新型快装套管头的设计与应用
Depositors have the protection of the casing side vacuum head and vacuum cups.
有保护套管存方真空头及真空杯。
A containing groove for containing the casing pipe is arranged on the gear shift rod head.
排档杆头上设有容置套管的容置槽。
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