-
1.发明授权
公开(公告)号：US1478813A
公开(公告)日：1923-12-25
申请号：US58760522
申请日：1922-09-11
Applicant: ERNST GIDEON BEK
Inventor： EMIL BECKER
IPC: B23K3/00
CPC classification number: B23K3/00 , B23K2201/30
Search Results
1
records
(took 0.008 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
