本装置由人力操作手轮，通过锥形齿轮等减速传动，直接驱动阀门阀杆上下移动，启闭阀门。
The device by the human operator launches, such as through the cone-shaped gear reducer drive, direct drive valve stem up and down movement of the valve gate.
PWR的压力释放装置主要有四种类型：直接作用式安全阀、先导操作压力释放阀、动力作用式压力释放阀和具有辅助装置的安全阀。
There are four types for PWR pressure-relieving devices: direct acting safety valve, pilot-operated pressure relief valve, power-operated pressure relief valve and safety valve with auxiliaries.
流化催化裂化装置再生器主风分布管的设计直接影响再生器的平稳操作。
The design of main air distributor in regenerator of FCCU is directly related to the smooth operation of regenerator.
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