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发明名称
Preparation of spherical contact masses
摘要
申请公布号
US2898304(A)
申请公布日期
1959.08.04
申请号
US19560566768
申请日期
1956.02.21
申请人
MINERALS & CHEMICALS CORPORATION OF AMERICA
发明人
POWELL MANLY J.;CECIL TOM A.
分类号
B01J2/06;B01J20/12;B01J35/08
主分类号
B01J2/06
代理机构
代理人
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