短语词组短語back -lash voltage [電子]反柵極電壓gear back -lash 輪齒隙Wwe back lash 爆裂震撼back lash adjustment 間隙調整back lash phenomena 廻差現象gear backlash 齒輪齧郃間隙；齒輪側隙；廻差backlash compensation 間隙補償 返回 back lash