有划伤和底部表面划伤。

There is scuffing and scratching on the bottom surfaces.

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封头裂纹产生原因可能是加工过程中板材表面划伤缺口和热压温度控制不当所致。

Head cracks may appear in the processing production due to the sheet surface scratches and improper control of pressing temperature.

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随着用户对焊管表面质量要求的不断提高，消除焊管表面划伤越来越受到人们的重视。

People more and more pay much attention to removing of surface scratch on welded pipe through the increasing surface quality requirement to welded pipe by end users.

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