The rock cutting techniques under deep water of practical application should consider the relations between cutting times, jet horizontally moving velocity and efficiency.
在深水环境条件下岩石切割技术的生产实际应用中，要综合考虑切割次数和射流横移速度与效率的关系；
Water jet, as a novel rock cutting tool, can be combined with mechanical method to increase penetrating efficiency.
水射流作为一种新型切割工具运用于石油钻井中，与机械联合破岩可提高破岩效率。
When cutting, drilling and fragmenting rock, failure mechanism around cylindrical load is an important research subject to improve cutting efficiency.
在岩体切割、钻孔或破碎时，明确圆柱荷载周边产生的破坏机制，是提高切割效率的重要课题。
When cutting, drilling and fragmenting rock, failure mechanism around cylindrical load is an important research subject to improve cutting efficiency.
在岩体切割、钻孔或破碎时，明确圆柱荷载周边产生的破坏机制，是提高切割效率的重要课题。
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