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发明名称
METHOD OF PRODUCING VOID INVESTMENT PATTERNS OF LARGE-SIZED CASTINGS
摘要
申请公布号
SU1613241(A1)
申请公布日期
1990.12.15
申请号
SU19894643995
申请日期
1989.01.30
申请人
NIKOLAEV IGOR N,SU;AKSENOV ALEKSANDR T,SU;PARSHIN ALEKSANDR N,SU
发明人
NIKOLAEV IGOR N,SU;AKSENOV ALEKSANDR T,SU;PARSHIN ALEKSANDR N,SU
分类号
B22C7/02
主分类号
B22C7/02
代理机构
代理人
主权项
地址
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