短语词组短語ground service bus 地麪勤務滙流條GSB Ground Service Bus 地麪服務滙流條ground -bus s 接地母線ground d bus 接地線ground bus line network 道路公交線網fault ground bus 故障接地母線insulated ground bus 隔離的接地母線electrical ground bus 電氣地麪公共汽車 返回 ground bus