switching in短语⁹⁰⁸⁸⁷⁺⁷ 基本例句 n.合闸接通 Carried out the remote control of master control computer to the concentrators via GPRS wireless network, introduced the principal and switching in method of GPRS module DTU. 采用 GPRS无线网络实现主控中心对集中器的远程控制，重点介绍了 GPRS无线接入模块 DTU的原理及接入方法； cnki