As the group call is different to the common call,it is necessary to study the handover technology in TD-SCDMA digital trunking system.是什么意思_As the group call is different to the common call,it is necessary to study the handover technology in TD-SCDMA digital trunking system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句