备用按钮开关的英文

• emergency push button switch
• emergency pushbutton switch

• 备用:    reserve; spare; alternate; b ...
• 按钮开关:    press-button switch; button ...
• 备用按钮:    emergency button
• 按钮开关:    bs button switch; buttonswitch; face contact; pb push button; press button key; press button switch; press stopper; push button switch; push contact; push switch; pushbutton actuator; pushbutton key; pushbutton switch
• 按钮开关盒:    push-button switch box