drill pipedrilpaip短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 钻杆 The key for solving the problem is to increase the drill pipe thickness, reduce working pressure and slideway friction coefficient, and rationally design the bending steering mechanism. 增加钻杆壁厚，降低工作压力和滑道摩擦因数，设计合理弯曲转向机构是解决问题的关键。 cnki