题目内容
For sand casting when the（ ）is removed, the remaining cavity of the packed sand has desired shape of cast part
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Sand Casting Mold consists of two halves, the Cope is the upper half of mold and the bottom half called the（ ）
Workers who perform casting are called（ ）
Casting can create complex part geometries with （ ）
Steps in casting are correspondently simple, first melt the metal, second pour it into a mold and thirdly（ ）
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