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摘要
申请公布号
US1797836(A)
申请公布日期
1931.03.24
申请号
US19290405411
申请日期
1929.11.07
申请人
EDMOND PAUL
发明人
PAUL EDMOND
分类号
C03B23/045
主分类号
C03B23/045
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