All those will be heuristic and instructive for the further renovation of drawworks and disk brakes structures and improvement of rig performance and quality.
英
美
- 提出了绞车和自动送钻改进意见和科研攻关重点,对今后钻机更新时绞车和盘式刹车结构改进、提高国产钻机的性能和质量,具有一定的启发和指导作用。