所有的管路、阀门、压力表都由高质量的不锈钢构成，并且都是标准配件。
All valves, regulators and gauges proposed for the gas distribution lines shall be of good quality, stainless steel type, made for specific gasses and shall be provided with standard fittings.
所述机械节流阀受到电控制，例如阀门位置受到根据所述压力表的输出进行的闭环控制。
The mechanical throttle valve is electrically controlled, e. g. the valve position is under closed-loop control to the output of the pressure gauge.
针型阀比其他阀门更能受压，密封性能好，所以一般用于较小流量，较高压力的气体或者液体介质的密封，还可与压力表配合使用。
Needle valve pressure better than other valves, sealing performance, it is generally used for small flow, high pressure gas or liquid sealing medium, also used in conjunction with the pressure gauge.
真空源连接到阀门的底部，一边连接的压力表，对方连接到系统中，真空被控制。
The vacuum source is connected to the bottom of the valve, one side connection is for a gauge, the other side connects to the system in which vacuum is to be controlled.
真空源连接到阀门的底部，一边连接的压力表，对方连接到系统中，真空被控制。
The vacuum source is connected to the bottom of the valve, one side connection is for a gauge, the other side connects to the system in which vacuum is to be controlled.
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