缓冲器

Counterbuff \Coun`ter*buff"\ (koun`t?r-b?f"), v. t.
To strike or drive back or in an opposite direction; to stop
by a blow or impulse in front. --Dryden.


Counterbuff \Coun"ter*buff`\ (koun"t?r-b?f`), n.
A blow in an opposite direction; a stroke that stops motion
or cause a recoil.