G
Global Positioning System(GPS) 衛(wèi)星定位系統(tǒng)
Global System for Mobile Communications(GSM) 泛歐數(shù)字式移動(dòng)通訊系統(tǒng)
Global Positioning System(GPS) 衛(wèi)星定位系統(tǒng)
Global System for Mobile Communications(GSM) 泛歐數(shù)字式移動(dòng)通訊系統(tǒng)