difference channel差: send on an errand; dispatch信道: channel; route; chain差信号: difference signal信道: [通信工程] (information) channel; route; chain差信号控制: difference signal control下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:差信道,即可在微信中查询翻译