| 标题 |
A theory of percussive drill bit penetration |
| 网址 | |
| DOI | |
| 其它 |
A theory of percussive drill bit penetration Author links open overlay panel P.K. Dutta Central Mining Research Station (CSIR), Dhanbad, India Received 10 January 1971, Available online 4 March 2003. What do these dates mean? |
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(2025-6-4)