Pick having limited angular movement, opposed directional cutting faces, and trunnion mounting therefor |
|||||||
| 申请号 | US59493466 | 申请日 | 1966-11-16 | 公开(公告)号 | US3413036A | 公开(公告)日 | 1968-11-26 |
| 申请人 | MINING PROGRESS INC; | 发明人 | PENTITH GERALD R O; FREDERICK WEBSTER; | ||||
| 摘要 | |||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈