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在某些钢结构的焊接时,从接缝坡口的正面进行焊接,而在接缝正、反两面都能得到均匀整齐无缺陷的焊道,称为单面
In the welding of some steel structures, the weld seam from the front of the groove, and in the seam of the positive and negative sides can get uniform and defect-free weld, called single-sided