Shrinkage occurs in two parts - as metal superheats above the melting point and has losses, causing shrinkage, followed by further shrinkage during solification.

　
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  • 收縮發(fā)生在兩個(gè)過(guò)程中，溫度高于熔點(diǎn)的金屬冷卻時(shí)產(chǎn)生收縮，隨后在凝固過(guò)程中進(jìn)一步收縮。
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