确定用户需求
indentify users’ requirements
用户用户业务主持人运营商
UserApplicatorEmceeOperator
已知的确定的已知的不确定因素
Known, Known-unknown, Unknown-unknown
Known
known-unknown
Unknown-unknown
采用用户仪器的测井服务
customer instrument service
带呼叫控制的用户对用户信令
UUSCC User – to – User Signaling with Call Control
导言及适用范围
preliminary and application
等待用户定义事件
wait-on-user-defined event
Woude
电力用户用电信息采集系统
power user electric energy data system