expendable pattern造句怎么写

The characteristics and advantages of expendable pattern casting process with dry sand and vacuum are briefly introduced.

The research status on the mold filling of expendable pattern casting process is reviewed from the aspects of mold filling characteristics,heat and mass transfer.

Mould filling of low-pressure expendable pattern casting process for magnesium alloys

expendable pattern material

In this paper the gas gap in the expendable pattern casting process was studied and the relation between the gas gap and collapse defect is discussed.