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公开(公告)号：US3424092A
公开(公告)日：1969-01-28
申请号：US3424092D
申请日：1966-10-28
Applicant: SMITH CORP A O
Inventor： HORTVET DOUGLAS R , BENNETT NORMAN C
CPC classification number: F04B53/144 , B05B9/0413 , F04B9/1056 , F04B53/06 , F04B53/164
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