The main contents of this dissertation are followed: 1? With the analyzing on the fundamental theory and the main characters of HDD and HGD, the author points out the shortcomings about the traditional design method;

  • 分析了非开挖定(导)向钻进技术的基本原理及钻孔轨迹的基本特点,指出了传统的钻孔轨迹设计方法存在的主要缺点;

  • 互联网摘选 2025-01-20 19:13:36

    • 相关例句
    精确
    • 模糊
    • 词首
    • 词尾
    • 词义
    • 例句