1) твёрдость
2) жёсткость
3) стойкость
4) суровость ( климата )
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- abrasion hardness
- ageing hardness
- ball hardness
- Barcol hardness
- Brinell hardness
- calcium hardness
- carbonate hardness
- coal hardness
- coke hardness
- conical indentation hardness
- diamond-pyramid hardness
- diamond hardness
- feedwater hardness
- grinding hardness
- heat-treated hardness
- indentation hardness
- Knoop hardness
- lapping hardness
- pendulum hardness
- penetration hardness
- quench hardness
- radiation hardness
- rebound hardness
- Rockwell hardness
- scleroscope hardness
- scratch hardness
- Shore scleroscope hardness
- Shore hardness
- strain hardness
- tempering hardness
- Vickers hardness
- water hardness
- wood hardness
- X-ray hardness