具有自动应答功能的录音电话机天津市市内电话局于世河具有自动应答功能的录音电话机（以下简称“录音电话机”），既可作为无人值守的自动电话机，又可作为普通电话机使用。录音电话机可分为磁带式和语言存储式两种，现简介如下：一、磁带式录音电话机１．原理和结构磁带... Automatic answering function of the recording telephone Tianjin City Telephone Bureau Yu Shihe automatic answering function of the recording telephone (hereinafter referred to as “recording telephone”), either as unattended automatic telephone, but also as an ordinary Telephone use. Recording telephone can be divided into two types of tape and language storage, are as follows: First, the tape recording telephone 1. Principle and structure of the tape ...