Disconnect the ground connection cable plug.

断开接地电缆插头。

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Localise the ground connection for the amplifier.

定位放大器的接地连接。

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Localise the ground connection cable of the amplifier.

定位放大器的接地电缆。

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Localise the ground connection cable of the amplifier.

定位放大器的接地电缆。

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