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公开(公告)号：US1869747A
公开(公告)日：1932-08-02
申请号：US41651329
申请日：1929-12-26
Applicant: UTILITY PRODUCTS COMPANY
Inventor： HOWARD WILLIAM S
IPC: B66C23/36
CPC classification number: B66C23/36 , B66C2700/0364
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