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发明名称
Method of forming shell molds and composition therefor
摘要
申请公布号
US2812561(A)
申请公布日期
1957.11.12
申请号
US19540443967
申请日期
1954.07.16
申请人
SUN OIL COMPANY
发明人
HETZEL STANFORD J.
分类号
B22C1/20;B22C1/22
主分类号
B22C1/20
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METHOD OF FABRICATING A FLASH MEMORY CELL
