在真空排气系统中，必须引蒸汽到汽轮机主轴迷宫式密封，以防真空损失。
In a vacuum exhaust system, sealing steam to the turbine shaft labyrinth seals must be admitted to avoid loss of vacuum.
如果排气系统处于真空下，必须在打开排气阀后，逐渐引蒸汽来加热壳体。
If the exhaust system is under a vacuum, the casing must be warmed by gradually introducing the steam, after opening the exhaust valve.
本文介绍一种以可编程控制器为主控单元的脉动真空蒸汽灭菌器的电气控制系统。
This paper introduces an automatic control system with PLC for pulse vacuum steam sterilizer.
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