Every command transmitted in the Short Message Gateway system has a sequence number, which is generated by the command source node and marks a command exclusively;

短消息网关系统之中传输的每一条命令都有一个序列号，序列号由命令源节点产生并唯一标记一条命令；

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Every command transmitted in the Short Message Gateway system has a sequence number, which is generated by the command source node and marks a command exclusively;

短消息网关系统之中传输的每一条命令都有一个序列号，序列号由命令源节点产生并唯一标记一条命令；

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