During the course of polishing, there is always a best pressure point between workpieces and sand belt for the life of sand belt and the polishing efficiency.

工件在抛光过程中，无论为延长抛光带的寿命，还是为提高抛光的效率，工件与抛光带之间都存在一个最佳的压力问题。

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Among the conclusion, point out how reach best construction efficiency, make it work low completion of cost in case of ensuring the quality of products not to reconnoitre subsequently.

结论中指出如何达到最佳施工效率，既而使勘察工作在保证质量的情况下更低成本的完成。

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