圆度是花键与真圆的圆廓之间的公差。
Out of Roundness is the variation of the spline from a true circular configuration.
但是山东人的性格果真圆满吗？
确保加工模具孔形的真圆度，该机又设计了稳定、高精度自定心的模座，从而提高模具的品质。
To ensure the degree of processing die's hole circle, it is also designed into a stable, high accurate self-centering mold base, thereby improving the dies quality.
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