hammers or impact members 锤或冲击部件
But the matching impact bits often dropped off from the pneumatic hammers and led the well accident caused by complex factors.
但是,空气锤、特别是配套冲击钻头断脱导致的井下事故时有发生,影响因素极为复杂。
The trenchless pneumatic hammers which don t rotate themselves during drilling include impact moles, pipe ramming hammers and pipe bursting hammers.
穿孔过程中自身不回转的非开挖气动锤包括冲击矛、夯管锤和爆管锤。
Thanks to the failure analysis of the hammers made of two different kinds of materials, it is certain that the cleanness of materials plays a great impact on the high-temperature corrosion.
对两种材料锤头失效的分析,确定了材料的洁净程度对高温腐蚀影响。
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