... axis of weld焊缝轴线; 焊接轴线 back hand welding后退焊; 反手焊接 back of weld焊缝背面 ...
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... backstep welding分段逆焊; 分段退焊; 反向焊; 逐步退焊法; 逆向焊 backstep welding sequence分段退焊次序 backward welding后倾焊; 后退焊; 向右焊 ...
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... 后退二 half astern 后退焊 back hand welding; back ward welding; backward welding 后退滑 retrogressive slide ...
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