The positive pressure distribution on the bearing surface of screw down system of 950 primary mill was studied using FEM and the corresponding improvement way has been put forward.

通过有限元分析，研究了950开坯机压下系统球面轴承表面正压力的分布情况，并据此提出了相应的改进措施。

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Primary investigation based on the applications of liners of different material qualities has showed that, the ball mill liners made from high chrome cast-iron exhibits longer service life.

通过多种不同材质衬板的工业使用，初步探明了用高铬铸铁制造的球磨机衬板，使用寿命较长。

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The screening technology is a primary way to insure high yield and super fineness of fine grinding mill. But it is mainly used in the obstructing equipment in the chamber of fine grinding mill.

采用磨内筛分技术是保证高细磨的高产量与高细度的主要技术措施，但主要使用在高细磨各粉磨仓的隔仓装置上。

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The profession has its roots in the welfare secretaries of the early 1900s, whose primary role was to ensure safety of the mill workers.

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