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公开(公告)号：US1550128A
公开(公告)日：1925-08-18
申请号：US60857122
申请日：1922-12-22
Applicant: JACOBUS JOHANNES WEFERS BETTIN
Inventor： ABRAHAM VERWER PIETER
IPC: E05B37/02
CPC classification number: E05B37/025 , Y10T70/409 , Y10T70/424 , Y10T70/5991 , Y10T70/7203
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