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jackhammer

US [ˈdʒækˌhæmər]
UK [ˈdʒækˌhæmə(r)]
  • n.风钻;气动凿岩机
  • Web手提钻;气锤;风镐
Plural Form:jackhammers  
jackhammer
n.
1.
风钻;气动凿岩机a large powerful tool, worked by air pressure, used especially for breaking up road surfaces