1、缩进的
...retraction 收回retractive 缩进的retractor 牵引器 ...
Retractive index折射率
retractive stress收缩应力
retractive force回缩力;收缩力
Retractive forces后牵引
Arch Retractive Switch窄面开关
pathological retractive ring释义病理性收缩环
heavy retractive pruning重回缩修剪
relay retractive spring继电器复原弹簧
retractive tube expander收缩式胀管器