单音录音机
bidding and tendering system
1#发电机单机启单泵
1# Generator Single Unit Initiating Single Pump
单机单负荷电力系统
Single-machine single-load power systems
单机单负荷简化法
single generator single load equivalence method
单声道台式收音机
single-channel table receiver
单声道斜束式流量计
single-path diagonal-beam flowmeter