weld seam pipe 焊缝管
steel pipe seam 钢管管缝
pipe-seam type anchor rod 管缝式锚杆
spiral seam pipe 螺旋缝管
high-frequency straight seam welded pipe 高频直缝焊接钢管
seam pipe 有缝制钢管
Seam welded clad pipe 缝焊包覆管
The test results show the band structure distribution has great influence upon the strong toughness of welded pipe seam.
试验结果表明：带状组织的分布对焊缝强韧性影响较大。
Main products are series bolts, series anchor cables, pipe seam roof anchor series and all kinds of steel, W strips, trays, machinery installation and so on.
主导产品是新型锚杆系列、锚索系列、管缝式锚杆系列及各种顶板钢带、W钢带、托盘、和安装机具等。
But with the same length of straight seam pipe than the weld length of 30 ~ 100%, and lower production rate.
但是与相同长度的直缝管相比，焊缝长度增加30 ~ 100%，而且生产速度较低。
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