General characteristics of plaster-mold casting contain
举一反三
- Expendable molds , which typically are made of sand, plaster, ceramics, and similar materials and generally are mixed with various binders(bonding agents) for improved properties. These materials are refractories (that is, they are capable of with standing the high temperatures of molten metals). After the casting has solidified, the mold is broken up to remove the casting.
- In sand casting, the use of a Core in the Mold Cavity provides（ ） A: external features B: internal features C: internal external features D: none of the above
- 中国大学MOOC: What are the general prose characteristics of Hemingway’s “In Another Country”?
- 中国大学MOOC: The general statement must not contain information that is too specific or too long in length.
- The general statement must not contain information that is too specific or too long in length. A: 正确 B: 错误