您要查找的是不是：
- 电源开关mains switch
- 行程开关travel switch
- 隔离开关isolating switch
- 开关量switching value
- 有些树的皮会片状剥落。The bark of some trees exfoliates.
- 光电开关photoelectric switch
- 按钮开关press stopper
- 开关电源switching power supply
- 按键开关keyswitch
- 切换开关switch (board)
- 点火开关ignition switch
- 拨动开关toggle switch
- 负荷开关load switch
- 薄膜开关thin film switch
- 感应开关inductive switch
- 拨码开关toggle switch
- 开关阀switch valve
- 开关管switching tube
- 开关箱cabinet switch
- 高压开关high tension switch
