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公开(公告)号：US3328926A
公开(公告)日：1967-07-04
申请号：US45360265
申请日：1965-05-06
Applicant: ADOR CORP
Inventor： KARL REINHARD
IPC: E04H15/20
CPC classification number: E04H15/20 , E04H2015/203
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