同义词
1)Global Systems for Mobile communications,GSM移动通信全球系统(全球通)2)Global System for Mobile Communication(GSM),全球移动通信系统(GSM)3)GSM(Global System for Mobile Communication),GSM全球移动通信系统4)Global System for Mobile Communication (GSM),全球移动通讯系统GSM5)GSM(Global System for Mobile Communications),GSM(全球移动通讯系统)6)GSM,GSM900,GSM1800 Global System for Mobile communications,全球移不动通信系统，900MHz的GSM系统，1800MHz的GSM系统
