汉英词典
Chinese-English Dictionary
MEANING OF 公用交換電話網
公用交換電話網
(公用交换电话网)
public switched telephone network / PSTN
公 gōng 用 yòng 交 jiāo 换 (換) huàn 电 (電) diàn 话 (話) huà 网 (網) wǎng
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