求翻译：划线前，钢材表面必须清理干净，去除油污、锈蚀等，发现钢材有裂纹、严重锈蚀等缺陷，应经检查部门做出处理后，方可划线是什么意思？

Crossed before the steel surface must be clean to remove oil, corrosion, steel cracks, severe corrosion and other defects should be made by the inspection department, before they crossed

Before scoring, the steel surface must be clean to remove oil, rust and corrosion, and steel cracks, serious corrosion, the check should be made by departments to deal with after scoring

Before the lineation, the steel products surface must clean up cleanly, the elimination greasy dirt, the corrosion and so on, discovered the steel products have flaws and so on crack, serious corrosion, after should pass through the inspection department to make processing, only then draws a line

Before the dash, steel surfaces must be cleaned to remove oil, rust, steel is found to have defects such as cracks, severe rust should be adopted after the inspection authorities to deal with it before they can dash

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