-
1.Plow-type cutter conveyor combination having slack coal clearing means 失效
Title translation: 具有松散清灰装置的犁式切割机组合公开(公告)号:US2786662A
公开(公告)日:1957-03-26
申请号:US44284754
申请日:1954-07-12
Applicant: STAMICARBON
Inventor: KRAPELS JOHANNES G
IPC: E21C35/20
CPC classification number: E21C35/20
-
2.Mining machine of the planer type having vertically spaced, pivoted cutting members 失效
Title translation: 具有垂直间隔的枢转切割构件的刨床型矿用机公开(公告)号:US2808252A
公开(公告)日:1957-10-01
申请号:US56430256
申请日:1956-02-08
Applicant: STAMICARBON
Inventor: KRAPELS JOHANNES G
IPC: E21C27/34
CPC classification number: E21C27/34
-
3.
公开(公告)号:US2764395A
公开(公告)日:1956-09-25
申请号:US49524355
申请日:1955-03-18
Applicant: STAMICARBON
Inventor: KRAPELS JOHANNES G
IPC: E21C27/34
CPC classification number: E21C27/34
-
-