电话网 diànhuàwǎng telephone network Definitions Defs Origin Strokes Stroke Words Sentences Sents 公共交换电话网 gōnggòngjiāohuàndiànhuàwǎng PSTN public switched telephone network (PSTN)公用交换电话网 gōngyòngjiāohuàndiànhuàwǎng PSTN public switched telephone network (PSTN)电话网路 diànhuàwǎnglù telephone network
