![PDF) Working mechanism and rock-breaking performance study of new core drill bit with negative pressure absorption effect PDF) Working mechanism and rock-breaking performance study of new core drill bit with negative pressure absorption effect](https://i1.rgstatic.net/publication/350583026_Working_mechanism_and_rock-breaking_performance_study_of_new_core_drill_bit_with_negative_pressure_absorption_effect/links/607580a8299bf1f56d52210a/largepreview.png)
PDF) Working mechanism and rock-breaking performance study of new core drill bit with negative pressure absorption effect
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![PDF) Working mechanism and rock-breaking performance study of new core drill bit with negative pressure absorption effect PDF) Working mechanism and rock-breaking performance study of new core drill bit with negative pressure absorption effect](https://www.researchgate.net/profile/Jialin-Tian-3/publication/350583026/figure/fig1/AS:1012093885112320@1618313394002/Structure-schematic-diagram-of-new-drill-bit-1-bit-body-2-fixed-blade-3-jet-channel_Q320.jpg)