在操作前，必须对压力极限、系统容积、净化要求等专门考虑，以决定是否要求额外的安全措施。
Before operation, special consideration must be given to pressure limitations, system containment, purging requirements, etc., to determine if additional safety measures are required.
监测大规模的热电厂的压力及温度以确保操作安全是十分必要的。
It is necessary to monitor pressures and temperatures to ensure the safe operation of large-scale thermal plants.
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.
本机设有电磁离合器、双离合器， 操作方便，安全可靠，冲压力大，是纸箱印刷与包装等行业的必要设备。
The machine has electromagnetism clutch two clutch, simple operating, safely, big momentum, it is necessary equipment for printing paper box and packing trade etc.
切记工人须按正规操作，经常检查压力表、报警器、安全阀管道畅通。
Workers shall operate normally and check pressure gauges, alarm and safety valve pipe flow regular.
该系列压力机结构简单，性能稳定、操作安全。
This series press structure is simple, performance stable, operational safety.
该系列压力机结构简单，性能稳定、操作安全。
This series press structure is simple, performance stable, operational safety.
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