-
公开(公告)号：US3454229A
公开(公告)日：1969-07-08
申请号：US3454229D
申请日：1967-09-01
Applicant: CHARLES V ARMOND
Inventor： ARMOND CHARLES V
CPC classification number: E03C1/046 , Y10T137/87619
Search Results
1
records
(took 0.008 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
