释义 |
downhole 英'daʊnhəʊl美'daʊnhoʊl COCA¹⁹¹⁷⁰⁶BNC⁶³⁴⁰³ 基本例句 向下打眼,向下钻进 All these provide a necessity and possibility for development of downhole- motor turbodrilling with high speed and big power, and directional drilling with continuous well course controlling technique. 所有这些都为发展高速大功率井下动力涡轮钻井和连续控制井眼轨迹定向钻井技术提供了必要性和可能性。 cnki |