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公开(公告)号：US2890138A
公开(公告)日：1959-06-09
申请号：US47101154
申请日：1954-11-24
Applicant: STALEY MFG CO A E
Inventor： SMITH CLIFFORD E , TIPTON JAMES E
IPC: C13K1/08
CPC classification number: C13K1/08
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