single seed descent, SSD
单路火灾报警控制器
single loop fire alarm control unit【安全】
暂无补充释义。
single loop fire alarm control unit【安全】
暂无补充释义。
single seed descent, SSD
single market
one-way trunk【通信】;one-way trunk line【通信】;single action trunk【通信】
single-pole circuit breaker
single-precision number
yig single crystal device【电子】;yttrium iron garnet single crystal device【电子】
single twitch
single degree of freedom system