curving of castings
... Precision Castings精密铸造件 curving of castings铸造圆角(防止铸件冷却时裂隙) honeycombed castingsn.蜂窝状砂眼废铸件 ...
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组合体可以理解为机器零件进行了必要的简化，去除了铸造圆角、技摸斜度以及工艺结构，是“几何化”了的机件。
Assembly can be understanded as the necessary simplification of machine accessory, the wiping off of foundry round corner, craftwork structure, etc, which is the geometrical work.
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