模拟电话通话
simulate telephone communication
《陆海军联合无线电话电报规程》
Joint Army and Navy Radiotelegraph and Radiotelephone Procedure
市内电话电话号码配换选号
Selection or Change of Telephone Number
单线普通螺纹
single-line regular screw thread
国家普通话水平考试
National Proficiency Test of Putonghua
普通电极
Non-balloon pacing electrodes lead