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发明名称
VERFAHREN ZUM ENTTINTEN VON ALTPAPIER.
摘要
申请公布号
DE68903636(D1)
申请公布日期
1993.01.07
申请号
DE1989603636
申请日期
1989.04.07
申请人
PPG INDUSTRIES, INC., PITTSBURGH, PA., US
发明人
DARLINGTON, BRUCE, WILLIAM, IRWIN PA 15642-3496, US
分类号
D21C5/02;(IPC1-7):D21C5/02
主分类号
D21C5/02
代理机构
代理人
主权项
地址
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