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

    体积管工作对于流量计在线检定系统来自输油管线本身。

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  • It introduces characteristic and kinds of line pipe for petroleum and natural gas transmission.

    简要介绍石油天然气输送用管线钢管种类及其特点

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  • Such valve can be used in medium, high pressure hydraulic and pneumatic pipe line of petroleum, chemical industry and power station.

    本发明特别适用石油化工电站高压管道

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  • Such valve can be used in medium, high pressure hydraulic and pneumatic pipe line of petroleum, chemical industry and power station.

    本发明特别适用石油化工电站高压管道

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