making hole method 成孔方法
making hole in curtain wall 幕墙开洞
no-coring making hole technology 无抽芯成孔技术
HOLE MAKING 孔加工
hole-making 钻井
hole-making assembly 打井装置
Making A Deeper Hole 出一个更深洞
The drill string of ERW is taken as research object, the dynamic problem is brought forward during making hole, and the mechanics model about each dynamic action is established.
以大位移井钻柱的部分或整体为研究对象,提出了钻井各种动态问题,建立了钻柱的各种动态行为的力学模型。
参考来源 - 大位移井钻柱振动规律及其应用·2,447,543篇论文数据,部分数据来源于NoteExpress
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