| 词汇 | jackhammer |
| 释义 | jackhammer 1 ENTRIES FOUND: jackhammer (noun) jackhammer /ˈʤækˌhæmɚ/ noun plural jackhammers jackhammer /ˈʤækˌhæmɚ/ noun plural jackhammers Learner's definition of JACKHAMMER [count] chiefly US : a heavy tool used to break hard substances (such as concrete) into pieces by a repeated pounding action风镐；手提钻 — called also pneumatic drill |
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