For on-line calibration system of flowmeter, the working fluid flow is from the petroleum pipe line itself.

体积管工作时的液流，对于流量计在线检定系统，是来自输油管线本身。

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For on-line calibration system of flowmeter, the working fluid flow is from the petroleum pipe line itself.

体积管工作时的液流，对于流量计在线检定系统，是来自输油管线本身。

youdao