Switch - Position Pilot Lights: Indicate source to which load is connected.

开关位置指示灯: 显示负荷连接至哪一种源.

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In addition, various pilot lights, arrestors, phase protectors and intrinsically safe relays are available as modifications.

此外, 作为改型件,还可提供各种指示灯, 避雷器, 相位保护器和安全火花继电器.

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