Methods: 1. The collagen solution used in the experiment was the soluble beef tendon collagen, with the main ingredient being type I collagen.
方法1。实验所用胶原溶液为可溶性牛腱胶原，其主要成份为I型胶原。
Methods: 1. The collagen solution used in the experiment was the soluble beef tendon collagen, with the main ingredient being type I collagen.
方法1。实验所用胶原溶液为可溶性牛腱胶原，其主要成份为I型胶原。
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