borings钻孔碎屑,金属切屑
boringadj.令人厌烦的;乏味的
boring bar bearing镗杆轴承
Boring preciseness镗孔精度
boring cutter hilt镗刀杆
boring-mill work镗铣加工
boring bar support镗杆支架
boring and position钻孔定位
boring advance rate掘进速度
boring of deep hole深孔镗削
boring conversation使人厌烦的谈话
boring turning tool镗孔车刀