短语词组短語Grounding Busbar 接地棒;接地母牌master grounding busbar 主接地母線telecommunication grounding busbar 電子通訊接地棒telecommunication main grounding busbar 電子通訊主要接地棒TMGB Telecommunications Main Grounding Busbar 遠程通信主接地滙流排 返回 busbar grounding