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经营范围
发明名称
Zone melting apparatus
摘要
申请公布号
US2897329(A)
申请公布日期
1959.07.28
申请号
US19570685652
申请日期
1957.09.23
申请人
SYLVANIA ELECTRIC PRODUCTS INC.
发明人
MATARE HERBERT F.
分类号
C30B13/20
主分类号
C30B13/20
代理机构
代理人
主权项
地址
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