category 7 cable standard是什么意思，category 7 cable standard的翻译，category 7 cable standard音标、读音、用法和例句_开心英文字典

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category 7 cable standard是什么意思，category 7 cable standard的翻译，category 7 cable standard音标、读音、用法和例句_开心英文字典_柠咚词