問題詳情
15. Shell molding is best described by which one of the following:
(A) casting operation in which themolten metal has been poured out after a thin shell has been solidified in the mold,
(B) casting processin which the mold is a thin shell of sand bonded by a thermosetting resin,
(C) sand casting operation inwhich the pattern is a shell rather than a solid form,
(D) casting operation used to make artificial seashells,
(E) none of the above?
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增