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公开(公告)号：US2482094A
公开(公告)日：1949-09-20
申请号：US68178046
申请日：1946-07-08
Applicant: CHAVANNES IND SYNTHETICS INC
Inventor： CHAVANNES MARC A , SHERRY ARTHUR B
IPC: B44C1/22
CPC classification number: B44C1/22 , Y10S428/913 , Y10T428/24736 , Y10T428/24942
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