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hardness scale | |||
hardness scale | |||
scale of hardness | |||
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scale of hardness |
硬度表: 48 phrases in 13 subjects |
Automobiles | 3 |
Aviation | 1 |
Compressors | 1 |
Dentistry | 1 |
Desert science | 2 |
Earth sciences | 4 |
Electric machinery | 1 |
Engineering geology | 2 |
Metallurgy | 19 |
Oil / petroleum | 1 |
Plastics | 1 |
Steel production | 1 |
Technology | 11 |