boring by percussionhammer drillingpercussion drillingpercussive drilling冲击: lash; pound式: type; style凿岩: drilling冲击式凿岩机: hammer drill; percussion rock drill; percussive rock drill; plug drill; thrust borer冲击式凿岩器: cogged bit下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:冲击式凿岩,即可在微信中查询翻译