开关的进线端和出线端是铜垫块时，铜垫块和联接板之间连接有软母线。
If the incoming and outgoing line ends are copper spacers, the soft bus connects the copper pad with the coupling panel.
开关的进线端和出线端是铜垫块时，铜垫块和联接板之间连接有软母线。
If the incoming and outgoing line ends are copper spacers, the soft bus connects the copper pad with the coupling panel.
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