文章针对刹把操作时手感力度的改变和“上抬”现象的产生，从设计角度提出了实现方法。
On the basis of change of feeling dynamic in operating brake handle, the paper proposes the realized method of brake handle artificial simulation from design side.
下放作业应在一名指挥的统一指挥下进行，指挥所处位置应在刹把操作者能直接看到并且安全的地方。
Mast laying down operation shall be guided by one commander, and the place where he stays shall be safe and within the driller's vision.
下放作业应在一名指挥的统一指挥下进行，指挥所处位置应在刹把操作者能直接看到并且安全的地方。
Mast laying down operation shall be guided by one commander, and the place where he stays shall be safe and within the driller's vision.
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