焊前须将焊件表面的油污及铁锈清理干净，选择适宜的焊接规范。

Cleaning the oil stain and rust of the welding surface before welding, choosing suitable welding standard.

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焊前须将焊件表面的油污及铁锈清理干净，选择适宜的焊接规范。

Cleaning the oil stain and rust of the welding surface before welding, choosing suitable welding standard.

youdao