ratchet ring的相关资料：
临近单词
ratcheting
ratchet
ratchet-wheel organization
ratchet winding wheel spring
ratchet sliding wheel spring
Ratchet and Clank - Working
ratchet outside line-up clamp
ratchet wheel driving wheelstud
ratchet-tooth lever escapement
ratchet wheel driving wheel stud
ratchet winding wheel swing lever
ratchet magnetic pulse oscillator
