题目内容 (请给出正确答案)
提问人:网友c********1 发布时间:2022年3月26日 11:37
[单项选择题]

大中型铸件采用旋转刮板造型时,其铸件尺寸精度有时比实样模造型要高,这是由于大型实样模()的原因。

A.变形量大

B.制模尺寸误差大

C.起模斜度太小

D.结构不合理

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