trunk,digit transfer是什么意思

用法例句

Data acquisition system of water saving irrigation based on wireless digital transmission;

基于无线数字传输的节水灌溉数据采集系统研究

Design of a data acquisition system based on wireless digital transmission;

基于无线数字传输技术的数据采集系统设计

Trunk Tester is equipment that is used to test trunk transmission equipment of the communications system.

干线综合测试仪是对通信系统中的干线传输设备进行检测的仪器。