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jackhammer 音標拼音: [dʒ'ækh,æmɚ] n. 手提鉆 手提鑽 jackhammer n 1: a hammer driven by compressed air [synonym: {air hammer}, {jackhammer}, {pneumatic hammer}] jackhammer \jackhammer\ n. a hammer having a strong steel cutting blade, driven by compressed air in multiple rapid strokes, and used for cutting through pavement, concrete, or other hard substances. Syn: air hammer, pneumatic hammer. [WordNet 1.5] marteau piqueur[Noun]
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