缝焊接

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缝焊接缝焊接

缝焊接

seam welding

石油词汇英语翻译_百度文库 ... seam welder 缝焊机 seam welding 缝焊接 seam 缝 ...

7
For all gas lines, all joints shall be orbital welded to minimize pressure fittings.

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