使用空气缸定位，无噪音，易于保养。

Adopting air-controlled positioning, noiseless and easy for maintenance.

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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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