大直径桩基础工程成孔钻具ii型钻具总体设计(RAR,毕业论文)_上学吧 关键词：成孔钻具；行星运动；气举反循环排渣. [gap=650]Keywords: hole drill machine；planet movement；aliminate the dregs with air anti circulate.
The spread drill, application of PHPmudand choice of machine are solvedbyadoptingtwo machines of KTY4000 and KPG3000A. Besides, the airliftreversingcirculation is selected inslagdischarge.