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

单词	horizontal directional drilling machine
释义	horizontal directional drilling machine Encyclopedia 工学掘进机械释 horizontal directional drilling machine水平定向钻机在不开挖地表面的条件下，铺设多种地下公用设施（管道、电缆等）的一种施工机械。
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