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21.发明授权Making board products and recovering water solubles from fibrous ligno-cellulose material 失效制造板材，并从纤维状木质纤维素材料回收水溶性物质
公开(公告)号：US2224135A
公开(公告)日：1940-12-10
申请号：US11360736
申请日：1936-12-01
Applicant: MASONITE CORP
Inventor： BOEHM ROBERT M
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