evolute of a surface

• 渐屈面

evolute of a surface的用法和样例：

例句

1. For example, a longitudinal incision on the flexor or extensor surface of a joint may cause a large unsightly scar or even a keloid that may permanently restrict motion.
   例如在关节屈面或伸面的纵行切口可导致难看的大疤痕甚至疤痕疙瘩，引起永久性关节活动受限。