石油专用管，包括油管、套管、管线管等。
于是研制了一个专门用于大型石化企业的管线管理系统。
Hence, a pipeline management information system was specially designed for large scale petrochemical enterprises.
无缝管线管主要是用于油井或气井的井口附近输送高压油、气的无焊缝钢管。
Seamless steel line pipe is a kind of steel pipe without seams, which is mainly used in the places near the mouth of oil well or gas well to transmit oil or gas with high pressure.
管线的信号和电源为分开，虽然是弱电，但是严格要求是必须强、弱电线管分开敷设。
Pipeline signal and power supply for the separation, although it is weak, but strict requirements must be strong.
应用范围从电线管道和扶手到运送煤气或腐蚀性液体的高压管线。
Applications range from electrical conduits and hand railings to high-pressure pipe lines that carry gas or caustic fluids.
保护模块的活力和德活力螺线管线圈拉在大约1.5秒。
The protective modules energize and de-energize the solenoid pull coil within approximately 1.5 seconds.
由于注水量较高、注水支线管径较细、管线较长等原因，导致注水支线阻力偏大；
More injection flow rate, slim branch injection pipe and long pipeline resulted in more resistance at the branch injection pipe.
以多边形铁素体为主的管线钢的强度不符合西气东输二线管道工程的技术要求。
However, X80 pipeline steel with PF as main morphology does not meet the specifications of the Second West-East Gas pipeline Project.
以多边形铁素体为主的管线钢的强度不符合西气东输二线管道工程的技术要求。
However, X80 pipeline steel with PF as main morphology does not meet the specifications of the Second West-East Gas pipeline Project.
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