問題詳情
13. A riser in casting is best described by which of the following:
(A) an insert in the casting that inhibitsbuoyancy of the core,
(B) gating system in which the sprue feeds directly into the cavity,
(C) metal thatis part of the casting,
(D) source of molten metal to feed the casting and compensate for shrinkageduring solidification, and
(E) not a waste metal that is usually recycled?
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