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pages/总复习2023t1.md

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 							  proportions
 							- Reshaped and refined by hand to explore
 							  and improve its quality
+						- Hard model
+							- Technically non-functional yet a replicas or
+							  copies of the final design
+							- Sometimes made from wood, dense foam,
+							  plastic, or painted
+							- Have some “working” features such as
+							  button that push or sliders that move
 					- 控制模型和 CAD 模型 Control Models and CAD Models
 						- 从 CAD 数据构建和匹配的模型Model that is constructed and matched from CAD data
 						- 产品的完整模型和完整详细的组成Complete model and fully detailed composition of the product