公用交换电话网 gōngyòngjiāohuàndiànhuàwǎng public switched telephone network Definitions Defs Origin Strokes Stroke Words Sentences Sents 公用交换电话网 公用交換電話網 gōngyòngjiāohuàndiànhuàwǎng public switched telephone network the public switched telephone network (PSTN) system
公用交换电话网 公用交換電話網 gōngyòngjiāohuàndiànhuàwǎng public switched telephone network the public switched telephone network (PSTN) system
