Phosphating: in steel on the surface of product form a layer of phosphate insoluble protective film processing.

磷化：在钢铁制件表面上形成一层不溶解的磷酸盐保护膜的处理过程。

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This article describes not only theoretical basis for achieving Product 's technical requirements by internal grinding processing double curved surface, but also improvement of equipment.

利用内圆磨加工双曲面达到产品技术要求的理论依据和设备改进方法作为一个课题研究。

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Study of a very efficient and fast surface roughness of the wood-line detection system for the improvement of timber processing efficiency and product quality are of great significance.

研究一套高效、快速的木材表面粗糙度在线检测系统，对提高木材加工的生产效率和产品质量都具有重要的意义。

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