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公开(公告)号：US1737213A
公开(公告)日：1929-11-26
申请号：US17616027
申请日：1927-03-17
Applicant: ROBERT JAMES WALKER
Inventor： MAURICE BERNON LOUIS
IPC: F22D5/12
CPC classification number: F22D5/12 , Y10T137/7371 , Y10T137/742 , Y10T137/7423 , Y10T137/7475
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