本文给出了该机的原理和整体结构，介绍了钻孔模块部分。并以推力气缸为例，详细说明了整机气动回路的工作原理及其动作顺序。

The work principle and the motion order of the pneumatic loop of total drill was explained based on the example of thrust force air cylinder.

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空气缸体执行机构的局限性在于机械弹簧的局限性和要求推力不超过75,000磅。

The limitations of air cylinder actuators are mechanical spring limits and thrust requirements in excess of 75,000 Ibs.

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空气缸体执行机构所采用的机械弹簧可以达到20,000磅的推力，及最大14英寸的冲程限制，主要取决于所需要的输出推力。

Mechanical springs used with air cylinders can be sized for up to 20,000 Ibs. of thrust and have a stroke limit of about 14 "max. depending on thrust output required."

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