(用平底扩孔钻)扩孔[锪孔,镗孔,镗阶梯孔],沉孔,埋头孔;扩孔钻;
Measurement Method and Experimental Research on Dynamic Force Behavior of Bottom Drill String counterbore with guide
底部钻柱动态力学特性测量方法与实验研究有导柱的平底扩充孔钻
The Design and Application of Mechanically Fixed Counterbore Drill
机夹扩孔钻的设计与应用
The government expected a temporary accord with the Opposition before the end of the year. counterbore with guide
政府期望年底以前和反对党达成临时协议。有导柱的平底扩充孔钻
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