期次粼‘一’L”’一~‘一~节~引.“下一”’一‘’~”一’一诵周------一堕__乡________________.__}星 孔加工刀具 1粉末冶金法生产的高速钢钻头的寿命1 2装可转位刀片的机用铰刀2 3钻孔、攻丝的深度控制2 4一种高效深孔加工工具2 5井寺形零件的深孔加工3 6饺孔、精撞时所用 Period of sparkling ’a’ L ’’ a ~ ’a ~ section ~ cited.’ ’Next’ a ’~’ a ’chanting weeks ------ a falling __ Township ________________.__} stars Hole machining tools 1 Powder metallurgy production of high-speed steel drill bit life 1 2 equipped with reamer indexable reamer 2 3 drilling, tapping depth control 2 4 a high-efficiency deep hole machining tools 2 5 Temple-shaped parts Deep hole processing 3 6 dumplings holes, used when the fine collision