井下通讯
underground communication
面向商的的通用语言
COBOL language
common business oriented language
COBOL
通用通讯交换装置
universal communication switching device
UCSD
通用通讯接口
galvanometer constantgeneral communication interface
GAPgeneral communication interface
gauge repeatabilitygeneral communication interface
行动通讯下的随压即说
Push-to-talk over Cellular
阀门填料泄漏的消除
Elimination of the leakage of the valve filler
回油滤清器的泄漏
leakage return oil filter
漏泄通信技术
leakage communica tion technology