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公开(公告)号：US3162212A
公开(公告)日：1964-12-22
申请号：US13724061
申请日：1961-09-11
Applicant: LEDING WILLIAM A
Inventor： LEDING WILLIAM A
IPC: F16K31/165
CPC classification number: F16K31/165 , Y10T137/8122 , Y10T137/86582 , Y10T137/87201
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