In fact, the industry now supplies 370 different types and styles in more than 70 different colors and in 18 degrees of hardness.

事实上，工业界现在提供着370种不同种类不同风格、超过70种不同颜色、18种不同硬度的铅笔。

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Applications of black Cr plating, different types of baths and the secondary additives used, and relationship between blackness and hardness of the coating have been summarised.

概述了黑铬镀层性能、黑度与硬度关系，目前出现的工艺类型、辅助添加剂和镀层应用等状况。

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In fact, the industry now supplies 370 different types and styles in more than 70 different colors and in 18 DE GREes of hardness.

事实上，工业界现在提供着370种不同种类不同风格、超过70种不同颜色、18种不同硬度的铅笔。

youdao