普通切换式电话网
GSTN General Switched Telephone Network
模拟电话通话
simulate telephone communication
市内电话电话号码配换选号
Selection or Change of Telephone Number
国家普通话水平考试
National Proficiency Test of Putonghua
普通电极
Non-balloon pacing electrodes lead
普通电渣焊
conventional electroslag welding
普通话
mandarin
Chinese
Putonghua
Manderin
complete biography
Mandrain
standard Chinese pronunciation
Mandarin putonghua
Chinese mandarin