建立了考虑管道弹性变形和含有一定量气体时输气管道严密性水试压稳压时间计算的数学模型。
A mathematical model about the duration of seal test of hydrostatic test for gas pipeline was developed firstly.
该A 3979包括一个固定关断时间电流稳压器，有能力在慢，快或混合衰减模式。
The A3979 includes a fixed off-time current regulator that has the ability to operate in Slow, Fast, or Mixed decay modes.
对JSBXC - 850型时间继电器稳压部分故障进行了分析，提出故检测及措施。
The troubles of JSBXC-850 time relay steady voltage unit, Analyzed and measures of trouble inspection were provided.
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