All fluid systems should be operated and air removed from systems and checked all leaks in piping systems. Cylinders and valves also should be operated manually.

所有的流体系统将用空气进行操作运行，以对管路系统中的所有泄露情况进行检查，液压缸和阀同样也要进行手动操作。

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Fluid controls - Danfoss 'direct operated, servo operated and assisted lift solenoid valves are available in a range of materials and performance levels.

液体控制——丹佛斯直接操作的螺线管阀存在于大范围的原料层和性能层。

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Doctors in 2005 operated again on Clinton to remove scar tissue and fluid that had built up after his bypass surgery.

CNN: Bill Clinton, fresh out of hospital, eager to go back to work

In 2004, after Duke University surgeons operated on thousands of patients using instruments inadvertently washed in used hydraulic fluid instead of detergent, Duke attorneys filed an action to recover costs against one of the patients who sued.

CNN: Bring medical misdeeds into the light