Some metallic parts are successfully fabricated using a vacuum pressure difference casting technology and a casting mouldshell technology.
通过采用真空压差铸造工艺，结合铸造型壳的制造，成功制造出金属零件。
2
The invention also relates to a shellmould producible by the method.
本发明还涉及采用这种方法生产的壳模。
3
The proper pouring and shellmould temperature have been suggested, so that both satisfied microstructure and excellent mechanical properties of superalloy K423A can be achieved.