-
公开(公告)号：US1329664A
公开(公告)日：1920-02-03
申请号：US27288219
申请日：1919-01-24
Applicant: YAHR I
Inventor： ROBERT JOHNSON
IPC: E01B13/02
CPC classification number: E01B13/02 , E01B2201/10
Search Results
1
records
(took 0.007 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
