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发明名称
Method of making shell moulds
摘要
申请公布号
US3292220(A)
申请公布日期
1966.12.20
申请号
US19630321425
申请日期
1963.11.05
申请人
PHILADELPHIA QUARTZ COMPANY
发明人
EMBLEM HAROLD GARTON;FOTHERGILL EARL WHITEWAY
分类号
B22C1/16
主分类号
B22C1/16
代理机构
代理人
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地址
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