【电话及其操作原理】印书馆北京.pdf
科技英语通俗读物 YOUR TELEPHONEANDHOWITWORKS 电话及其操作原理 赫尔曼施奈德尔 [美]著 尼娜施奈德尔 高耘田注释 商务印书馆 1965年北京
CONTENTS 1.PEOPLELIKETOTALK.SOUND AND SOUND MAKERS.THETELEPHONE 4.THEDIALTELEPHONE.
With a telephone you cantalk to somebody at the other end oftown or theotherendoftheworld.You willbe heard just as clearlyas if thetwOf youwere in the same room And you dont have to waitforan answer,because the telephone can zip² your words from oneplaceto another inlesstimethan ittakestoblink