The geometrical accuracy of the inversion tube is increased by using this kind of die.
用这种模具翻管，可提高翻管制件的几何精度。
Plane is the mechanical base of geometrical accuracy and a lot of references such as plate, level and square, etc. are evolved from the plane.
几何精度的机械技术基础是平面，由平面可演变出基准平尺、平板、方尺等精度基准。
Superimposing and comparing two geometrical data sets of differing origin and accuracy often give rise to a large number of small polygons.
叠加和比较二个几何资料不同的起源和准确性经常造成很大数量的小几何图形。
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