短语词组短语back -lash voltage [电子]反栅极电压gear back -lash 轮齿隙Wwe back lash 爆裂震撼back lash adjustment 间隙调整back lash phenomena 回差现象gear backlash 齿轮啮合间隙；齿轮侧隙；回差backlash compensation 间隙补偿 返回 back lash