“horizontal directional drilling”的概念、定义、翻译、参考文献-科学参考

单词	horizontal directional drilling
释义	horizontal directional drilling Encyclopedia 工学掘进机械释 horizontal directional drilling水平定向钻将一个可调向操控的钻头连接在钻杆组的端部，用于地下水平定向钻孔的机具。是在不开挖地表面条件下，铺设多种地下公用设施（管道、电缆等）的施工设备，广泛用于供水、电力、电信、天然气、煤气和石油等管线铺设施工中。
随便看	Sachs-Wolfe effect Sachs-Wolfe效应 Sacks density theorem Sacks splitting theorem Sackur Tetrode equation Sackur-Tetrode equation Saclateni sacral bone sacral nerve sacral nerve stimulator sacral spinal cord sacrament Sacramento sacrament of anointing Sacramento Peak Observatory Sacramento River Sacred bell of the Great King Sengdeok Sacred City of Anuradhapura Sacred City of Kandy Sacred College of Cardinals sacred groves sacred lotus sacred mountains of scenic regions sacred natural sites sacred space

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