短语词组短语ROTARY SWITCH KNOB ASSEMBLY 旋转开关组件Unique rotary volume knob 独特转盘式音量旋钮class selector rotary knob 脱扣级别选择开关Baro rotary knob 气压设置旋钮A dual concentric rotary knob 同心双旋钮 返回 rotary knob