-
公开(公告)号:US2800876A
公开(公告)日:1957-07-30
申请号:US39664853
申请日:1953-12-07
Applicant: SMITH CORP A O
Inventor: PLOETZ EDWIN C
-
公开(公告)号:US2842840A
公开(公告)日:1958-07-15
申请号:US40964054
申请日:1954-02-11
Applicant: SMITH CORP A O
Inventor: PLOETZ EDWIN C
CPC classification number: C03C27/04 , C23D5/00 , Y10T29/49885 , Y10T29/49888
-