Cov teeb meem uas yuav tshwm sim nyob rau hauv submerged arc vuam cheeb tsam muaj xws li pores, thermal tawg, thiab undercuts. 1. Npuas. Cov npuas feem ntau tshwm sim hauv nruab nrab ntawm qhov vuam. Qhov laj thawj tseem ceeb yog tias hydrogen tseem muab zais rau hauv cov hlau welded hauv daim ntawv ntawm npuas. Yog li, cov kev ntsuas kom tshem tawm ...
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