数字-数字数据变换器
digital-to-digital data converter
船无线电话数字
ship radiotelephone numeral
带正负号数字数字系统
signed digit number system
地电数字数据
Digital geoelectricity data
多色数字绘图仪
multicolor digital plotter
交互数字绘图器
interactive digital plotter
数据电话数字服务
dataphone digital service
adjust measures to local conditions
DDS
数字电话交换机
digital telephone exchange
Digital Telephone Exchange TXD
数字电话交换局
digital telephone exchange
digital telcphone switching system
数字电话交换业务
digital telephone switching service
digital telephone switching
Service
数字电话网
digital telephone network
Digital telephone switching network
数字电话网络
digital telephone network
Digital Telephone Network DTN