protective system oil line；保护系统油路 protective system operation；保护系统的工作 protective system shutoff actuator；保护系统切断致动器 ..
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Power interlock protective system ensures safe operation.
电源连锁环保系统，保障操作安全。
Before the operation of the motor, the system detects the external protective circuit, PLC and its internal program.
在电动机运行前，该保护系统对外部保护线路、PLC内部程序及PLC自身进行检查。
The protective measures against water hammer in hot-water heat-supply system are discussed from aspects of design and operation.
从设计和运行两方面探讨了热水供热系统的水击防护措施。
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