The high cycle rate of the valves, and the abrasive nature of the quartz powder require an abrasion resistant valve that will last.

由于阀门使用的高频率，以及石英粉末的研磨特性，都要求耐磨性很高的阀门才经受得起。

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The sharp, abrasive nature of the particles suggested they could have damaged the bodies of aircraft and the Windows - reducing visibility.

这些颗粒锋利而粗糙的性质，暗示着它们能损坏飞行器的机体和舷窗——这会降低可见度。

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This is because the very nature of the tool involves a cutting or abrasive action.

这是很自然的，因为牵涉切削工具或磨料行动。

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The suction, along with the abrasive nature of salt water, wears their teeth down.

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Astra's big shareholders are aware of Mr Mogren's abrasive nature, but have preferred to judge him by results.

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