back-up
背齿轮
back gear
暂无补充释义。
相关词条
ladder-back
back teeth
book back gluing machine
back breaking
back-pedal brake with cams for cycles
back center (lathe center)
back-end computer
back gear
暂无补充释义。
back-up
ladder-back
back teeth
book back gluing machine
back breaking
back-pedal brake with cams for cycles
back center (lathe center)
back-end computer