advanced percussive drill的用法和样例：
- However, the SEP in diamond rotary drilling was higher than the SEP in percussive drilling in lightly weathered hard as well as in extremely hard rock.
- Keywords impact;wave mechanics;hydraulic percussive drill;design;
- This paper explains and proves briefly that the incident wave differes from the percussive force in percussive drilling, and both are two different conceptions.
- This paper introduces the automatic drilling principle, the hardware composition and software program in the windlass percussive drilling by the microcomputer control system.