1, Izindunu Welding flange annealing lokushisa kufika ezingeni lokushisa eshiwo, butt Welding flange ukwelashwa ngokuvamile kuthathwa isixazululo ukushisa ukwelashwa, okungukuthi, abantu ngokuvamile okuthiwa "annealing", izinga lokushisa 1040 ~ 1120 ℃. Ungabuka futhi nge-annealing furnace observa...
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