只有当去氧化皮工具到位且与工件接触时，才应运转抛丸工具。
Impact tools shall be operated only when the scaling tool is in position and in contact with the workpiece .
酸浓度较高时可更快地去除锈与氧化皮，但是可能会对钢材造成更严重的侵蚀。
Higher concentrations of acid remove rust and scale more rapidly but may attack the steel more severely .
去氧化皮