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经营范围
发明名称
POROUS SILICATE
摘要
申请公布号
GB1259721(A)
申请公布日期
1972.01.12
申请号
GB19690038316
申请日期
1969.07.30
申请人
PHILADELPHIA QUARTZ COMPANY
发明人
分类号
C01B33/32;C11D3/40;C11D7/14;C11D17/00
主分类号
C01B33/32
代理机构
代理人
主权项
地址
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