| 释义 |
rock bit
Thesaurus| Noun | 1. | rock bit - a drill bit that has hardened rotating rollersroller bitdrill bit, drilling bit - a bit used in drilling for oil |
rock bit
rock bit[′räk ‚bit] (engineering) Any one of many different types of roller bits used on rotary-type drills for drilling large-size holes in soft to medium-hard rocks. rock bit
Synonyms for rock bitnoun a drill bit that has hardened rotating rollersSynonymsRelated Words |