【摘要】 立轴式液压钻机当前在应用中存在的一些弱点,主要来自给进系统。本文就此阐述了笔者的见解,还提出了调速回路的新构想。更多还原

【Abstract】 Some weak points,mainly come from the feed system,of the vertical shaft hydraulic drill now in use are exposed.In this paperthe author expounds his own idea and puts froward a new conception on speed controlloing eircuit.更多还原