Leather is by ossein type piece the material of poriferous fiber shape that poriferous matrix makes record.
皮革是由骨胶原类型片状多孔基质构成的多孔纤维状物质。
化]骨胶原Leather is by ossein type piece the material of poriferous fiber shape that poriferous matrix makes record.
皮革是由骨胶原类型片状多孔基质构成的多孔纤维状物质。
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