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生皮-生皮通常分为制革原料皮和毛皮原料皮，新鲜生皮含有蛋白质、水分、类脂物和少量盐类。最重要的是蛋白质，其中含量最大的是胶原，其次是角蛋白等，它们是革和毛皮的基础物质。-shengpi</br> generated by yvsou girl
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(28.56701.236.7261.7281.7332)
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