其余五个组分别用不同比例的脱铬皮渣骨粉，BE—饲料酵母和脱铬皮革粉等量代替鱼粉，即试验组。

The first was control group, which contained 4% of fish meal were replaced with different proportions of detannery Ieather & Bone Meal(DLBM), BE—Feed Yeast(BE—FY)and Detannery Leather Meal(DLM).

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将带有某些耐酸基团的树脂用于预鞣时，这类树脂会占据皮纤维间的部分空隙，从而对随后的鞣制工序中皮对铬的吸收产生影响。

When some kinds of resin with acid resistance radicals are used in pretanning process, the part of space in skin fibre is occupied by these resin, so the exhaustion of chrome is improved.

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蛋白胨及其衍生物；其他税目未列名的蛋白质及其洐生物；皮粉，不论是否加入铬矾。

Peptones and their derivatives; other protein substances and their derivatives, not else - where specified or included; hide powder, whether or not chromed.

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