短语词组短语End -milling accuracy 端部铣平精度micro -end-milling 微细立铣削rail -ending machine -end-milling machine 钢轨端面铣床end upd -type milling mveryine 床型卧式铣床ball -end milling cutter 球头铣刀flat -end milling cutter 平头立铣刀 返回 end-milling