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公开(公告)号：US3483670A
公开(公告)日：1969-12-16
申请号：US3483670D
申请日：1967-12-15
Applicant: KOPPERS CO INC
Inventor： QUINTILIAN BARTHOLOMEW F , ZARFOSS JAMES R
CPC classification number: B03C3/86 , Y10T29/49929 , Y10T29/49934 , Y10T403/3946 , Y10T403/4991
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