Pocket JackHammer袖珍电钻
jackhammer drill手提锤钻
Jackhammer John大锤约翰
jackhammer r轻型凿岩机
jackhammer launcher多联装火箭发射器
jackhammer operator手持凿岩机操作工
Jackhammer air drill杰克哈默压气钻
N-COUNT（可数名词） A jackhammer is a large hammer, powered by compressed air, that is used for breaking up rocks and other hard material. 手提钻
Outside a jackhammer was pounding away at a particularly stubborn piece of concrete.
在外头，一个手提钻正在猛打一块特别坚硬的混凝土块。