switch knob旋钮: knob转换旋钮: shift knob切换旋塞: changeover cock; switch cock; switchcock油量表转换旋钮: fuel quantity gauge selector knob旋钮: knob 卷片旋钮 film winder; 双套筒旋钮 dual knobs; 调谐旋钮 tuning knob; 音量控制旋钮 volume control knob下载手机词典可随时随地查词查翻译