短语词组短语jack engine hammer 气锤jack -hammer e 手持式风钻jack hammer drill 手持式凿岩机;手提锤钻pneumatic jack hammer 气动锤shocking jack hammer 冲击式凿岩机hydraulic jack hammer 液压凿岩机motor jack hammer 内燃凿岩机electric jack hammer 电动凿岩机 返回 jack hammer