for petroleum pipe 石油管螺纹硬质合金三角形刀片 carbide welded side and face milling cutter 硬质合金焊接式三面刃铣刀 carbide welded straight shank twist drill 硬质合...
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The American Petroleum Institute (API) provides standards for pipe suitable for use in both the oil and natural gas industries (figure 4).
美国石油协会对适合应用于石油和天然气行业的管材制定了标准(如图4)。
It introduces characteristic and kinds of line pipe for petroleum and natural gas transmission.
简要介绍了石油天然气输送用管线钢管的种类及其特点。
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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