... 回采平巷 butt heading 对接焊管 butt welded tube 按钮式开关 button switch ...
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... butt welded pipe平焊接管 butt welded tube平焊接管 butt welder对焊机 ...
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butt-welded tube 对缝焊管 ; [机] 对焊钢管 ; 对口焊接钢管
electric resistance butt welded tube 电阻对缝焊管
butt-welded E tube 对缝焊管
butt-welded U tube 对缝焊管
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The round plates with arc shaped butt-welded joints were used for stopping sone tube holes which were moved away to another proper positions in the pipes.
采取有弧度的圆形镶块，以对接接头的形式堵补部分管孔，将其移位到管道上的合适位置。
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