... 主油管堵塞阀：master and block valve 主油管：main loading and discharging line 主用频率：primary frequency ...
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本文介绍了卡特匹勒121型柴油机机体主油管长圆柱坭芯挤压机的结构和基本工作原理。
This paper describes the structure and basic operating principle about the squeezed ma - chine of core of the long cylinder of main oil pipe of Cat, 121 diesel engine's body.
提出采用主磁通与漏磁通相结合的方法检测在用油管剩余壁厚的方法。
A measuring method combining main magnetic flux and magnetic flux leakage for approaching the residual wall thickness of the oil well tubing in-service was presented.
长距离输油管道一般需要给油泵(设在首站)和主输油泵两种。
In general, a long distance oil transporting pipeline needs both feeding pumps (installed in the first pumping station) and main delivery pumps.
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