Cast iron manhole cover of good quality is to see its toughness and hardness.

质量好的铸铁井盖是要看其韧度和硬度的。

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This failure analysis was performed by using macro check, micrography and hardness measurement.

采用宏观分析、显微检验和硬度测定对压铸模进行了失效分析。

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Another quality of line that's more difficult to achieve is variation in the softness and hardness.

线的另一性质更加难以企及，那便是软硬的变化。

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Further, the weight, texture and hardness of objects we touch affects our opinion of the people and the situation.

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Crater samples of the silicone carbide were found to have the brilliance, clarity and hardness comparable to that of a diamond.

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Branagan says he can increase the hardness and toughness of steel without a corresponding decrease in malleability.

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