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焊缝热影响区的宽度是()。
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焊缝热影响区的宽度是()。
A、1mm以内
B、2mm以内
C、3mm以内
D、不一定
时间:2022-02-26 19:22
关键词:
高级船体装配工
船体装配工
水路交通运输技能考试
船舶修造业考试
答案解析
D
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