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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Direct-buried cable ： ウィキペディア英語版 Direct-buried cable Direct-buried cable (DBC) is a kind of communications or transmissions cable which is especially designed to be buried under the ground without any kind of extra covering, sheathing, or piping to protect it. Most direct-buried cable is built to specific tolerances to heat, moisture, conductivity, and soil acidity. Unlike standard telecommunications and power cables, which have only a thin layer of insulation and a waterproof outer cover, DBC consists of multiple layers of heavy metallic-banded sheathing, reinforced by heavy rubber covers, shock absorbing gel, wrapped thread-fortified waterproof tape, and stiffened by a heavy metal core. DBC is preferable in some areas since it is more resistant to being the focus of lightning discharges. == Communications == Most cable of this kind is coaxial or bundled fiber-optic in nature. Direct-buried cable is cheaper and easier to lay than other kinds of cable that require protection from the earth.〔 However, DBC is also easily cut during digging or other excavations. As a result, most direct-buried cable is found on side roads, not main thoroughfares. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Direct-buried cable」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.