rfch reverse fundemental channel反向: opposite direction; reverse; ...基本: basic; fundamental信道: channel; route; chain前向基本信道: f-fch forward fundemental channel基本信道: primary channel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:反向基本信道，即可在微信中查询翻译
