... wire reel 焊丝盘，绕线盘 wire relaying 有线中继，有线转接 wire repeater 有线电中继系统 ...
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pilot wire relaying protection 引示电驿保护
pilot wire relaying system 表示线継电方式
The telegraph allowed a rudimentary wire service, relaying stories between cities at a faster pace.
CNN: Understanding The Role of the Media
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