7pipes Shall not have any circumferentialseam joint in a random length.
7任意长度的管子不应出现任何圆周接缝。
2
Using a seam auto - tracking technique with arc sensor, seam tracking experiments for circumferential lap weld of automobile air storage vessel have been performed in this paper.
Absreact the circumferential welding and the straight seam welding at all position can be realizable by using welding crawl equipment for all position together with the flexible metal band track.