有關架空電纜的問題
回答 (3)
2007-10-15 6:13 am
✔ 最佳答案
1. made by steel wires; because high strength.有那2個小原因為何會有這樣的轉變??
2. i don't understanding.
2 s' receive & transmit sensor on tower of each phase wire.
Ball on top for flight ; easy to look for safety.
OK?
2007-12-29 3:21 am
其他答案更好。
2007-10-16 3:25 am
架空電纜用銅鋁合金造，銅雖然導電好但重，全鋁很輕但導電差很多，其合金不重又導電不錯，適合長距螭電塔，132000伏特電壓令導電稍差也不是問題！
參考: me
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https://hk.answers.yahoo.com/question/index?qid=20071014000051KK04373