城市生活无着的流浪乞讨人员的救助管理办法
Measures for Assisting Vagrants and Beggars with No Means of Support in Cities
关于危险废物的环境无害管理开罗准则和原则
Cairo Guidelines and Principles
具有无缝性能的焊管
Welded pipe with seamless performance
无潜水员协助的出油管连接
diverless flow-line connection
无人看管的多点通信站
UMCS Unattended Multipoint Communication Station
无人看管的应答辅助设备
UAN Unattended Answering Accessory