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发明名称
Process of refining clay
摘要
申请公布号
US2180742(A)
申请公布日期
1939.11.21
申请号
US19370142180
申请日期
1937.05.12
申请人
BIRD MACHINE CO.
发明人
LYONS SANFORD C.
分类号
C04B33/10;C12H1/048
主分类号
C04B33/10
代理机构
代理人
主权项
地址
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