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岩石硬度
eng.geol.	hardness of rock
expl.	rock strength factor
oil	rock hardness; formation hardness
岩石硬度岩石抵抗工具侵人其表面的能力指标。它是影响机械方法破碎岩石效果的基本量值。按测量方法不同，主要有刻划硬度、压人硬度和回弹硬度三种
expl.	hardness of rock

岩石硬度: 11 phrases in 3 subjects

Earth sciences	1
Explosives and Explosive Ordnance Disposal	3
Technology	7