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发明名称
METHOD OF OBTAINING FELDSPATHOIDAL QUARTZ FROM WEATHERED GRANITE
摘要
申请公布号
PL266348(A1)
申请公布日期
1989.01.05
申请号
PL19870266348
申请日期
1987.06.17
申请人
发明人
分类号
C04B;(IPC1-7):C04B/
主分类号
C04B
代理机构
代理人
主权项
地址
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