specifications of voice frequency telegraphic interface电报: telegram; cable; telegraph; ...音频: audio frequency; VF接口: joggle; nozzle; mouthpiece; ...技术: technology; skill; technique ...要求: ask; demand; require; claim; ...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:电报音频接口技术要求，即可在微信中查询翻译
