jet type tricone bit喷射: spout; spurt; jet式: type; style三牙轮钻头: three cone bit三牙轮钻头: three roller bit; three-cone bit; three-roller bit; tricone bit; tricone rock bit; trionebit喷射式牙轮钻头: jet nozzled rock bit下载手机词典可随时随地查词查翻译
