不溶性氧化物相留存在残渣中。
钢材表面应无可见的油脂和污物，并且没有附着不牢的氧化皮、铁锈和油漆涂层及其它杂质（水溶性盐和焊接残渣）。
Steel surface should be no visible grease and dirt, and there is no attachment not firm scale, rust, paint and other impurities (water soluble salt and welding residue).
上述残渣分别在碱液和酸液中浸提、抽滤、清水洗至中性，干燥后得到水不溶性膳食纤维产品。
The water insoluble dietary fiber is obtained by leaching the residue in alkali solution and acid solution respectively, suction filtering, water washing to neutral, drying.
上述残渣分别在碱液和酸液中浸提、抽滤、清水洗至中性，干燥后得到水不溶性膳食纤维产品。
The water insoluble dietary fiber is obtained by leaching the residue in alkali solution and acid solution respectively, suction filtering, water washing to neutral, drying.
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