受欢迎的。你指的是(摩氏硬度规模)[1],一个定性规模快速确定,是否有划痕(雕刻一个标志)。他们国家有相反的方向。当然,给予足够的压力或动能刮刀可以体验变形,但这不是锻炼的意义。一个人可以很好与指甲划痕石膏和长石钢钉。你不要锤,不抓反复或比必要的力量。例如,它更像是用小刀切割木材。没有分子数和微观痕迹调查,它只是一个表面目视检查在现场使用。实验室工作之后。https://geology.com/minerals/mohs-hardness-scale.shtml https://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness https://www.nps.gov/articles/mohs-hardness-scale.htm编辑:针对下面的备注,玩耍和做一些像模像样的,(这里有一个工作)[2],处理大猫的爪的力量对猎物的骨骼和肌肉。 Even though the claw, being made of keratin (like horn, hoove, nail, ...), only has a Mohs hardness of 2.5, it can do considerable damage to a bone of hardness 5. That's because of the kinetic energy induced by the sweep of a paw and the chain of muscles at whose end it sits. So, don't let your tigers play with the phone. They will simply crush it :-) [1]: https://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness [2]: https://blogs.plos.org/everyone/2013/09/20/the-power-of-the-claw-not-your-average-soft-material/