Carry out surface preparation by grinder and dust free self-enclosed portablegrinder until to remove surface laitance and provide sound and textured surface.
使用地坪打磨机和无尘封闭手提磨机去除表面粗糙物，并提供涂装对表面所要求的粗糙度。
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The research indicates that grinding the dented roller with a portable angle grinder and making the roller run in with harder billet are effective to eliminate the pit d…