为防止锈蚀，瞄准镜外部未涂漆的金属表面须涂以炮用润滑脂SY4019-85。
Apply lubricating grease SY4019-85 for artillery at the metal surface of exterior of sighting telescope without painting to avoid corrosion.
采用基于N - S方程的CFD方法，研究矩形、斜面台阶形、圆弧形、三角形、多圆弧形以及正弦形织构表面的动压润滑性能。
The hydrodynamic lubrication performance of rectangle, inclined plane, circular-arc, triangle, multi-arc and sine surface texture was researched with CFD method based on N-S equation.
分析了弹性变形、表面粗糙度对润滑性能的影响，并提出了开槽环的设想。
We analyse the influence of the elastic deformation and the surface roughness for lubricating characteristics and give a thought of cutting groove in piston ring.
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