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发明名称
摘要
申请公布号
JPH05270834(A)
申请公布日期
1993.10.19
申请号
JP19930003839
申请日期
1993.01.13
申请人
发明人
分类号
C01B25/45;C01G31/00;C09C1/00;(IPC1-7):C01G31/00
主分类号
C01B25/45
代理机构
代理人
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