-
公开(公告)号：US2152008A
公开(公告)日：1939-03-28
申请号：US69954733
申请日：1933-11-24
Applicant: BAASH ROSS TOOL CO
Inventor： YARBROUGH HAROLD C
IPC: E21B43/112
CPC classification number: E21B43/112
Search Results
1
records
(took 0.009 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
