e) Prior to pickling, all heavy deposits of oils, greases, soils or foreign matter other than millscale, rust or rustscale shall be removed by precleaning as cited in 5.1.
酸洗前,除了铁鳞、铁锈之外,诸如油、油脂、土或杂质等所有的重沉淀物均应通预清洗来清除,如5.1中所述。
e) Prior to pickling, all heavy deposits of oils, greases, soils or foreign matter other than millscale, rust or rustscale shall be removed by precleaning as cited in 5.1.
酸洗前,除了铁鳞、铁锈之外,诸如油、油脂、土或杂质等所有的重沉淀物均应通预清洗来清除,如5.1中所述。
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