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公开(公告)号:US3108789A
公开(公告)日:1963-10-29
申请号:US73809858
申请日:1958-05-27
Applicant: UNION CARBIDE CORP
Inventor: HEIMASTER JOHN W , JENKINS FRANK W , ROGERS LOUIS J
IPC: E21C35/04
CPC classification number: E21C35/043
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公开(公告)号:US3056952A
公开(公告)日:1962-10-02
申请号:US77277058
申请日:1958-11-10
Applicant: UNION CARBIDE CORP
Inventor: HEIMASTER JOHN W , MILLER JOHN R
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13.Bore mining apparatus having means to measure the angle between units thereof 失效
Title translation: 钻孔采矿设备具有测量其单元之间的角度的装置公开(公告)号:US2886299A
公开(公告)日:1959-05-12
申请号:US58172856
申请日:1956-04-30
Applicant: UNION CARBIDE CORP
Inventor: HEIMASTER JOHN W , MCNEILL ROY L
IPC: E21D9/00
CPC classification number: E21D9/003 , Y10T403/32196
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