The pattern magnification is the ratio which can be obtained from a size difference between the patter size and the blue printing size divided by the original size of the blue print.

• 模样放大率是指根据铸件图纸制作模样时,模样相对铸件图纸放大的百分数,其值为模样尺寸与铸件图纸尺寸之差除以铸件图纸尺寸的百分数。