drills

drills of lettuces.

一排排的条播莴苣。

drills in reading comprehesion

阅读理解训练

to drills students in English grammar

让学生练习英语语法

twist drills are sized in millimetres.

螺旋钻的大小按毫米来划分。

In learning a foreign language, question and answer drills are good disciplines.

学语, 问答练习是很好的训练方法。

drills holes in trees with its chisellike bill.

用子一样的啄在树上打洞

Question-and-answer drills: Zooblast cultivates with plant, microorganism cell cultivation diversity?

问答题：胞培养与植,微生胞培养的不同？

Sinter type fastigiate-handle drills:Use for drilling hard and brickle material,...

简 介: 烧结锥柄钻头：适用于玻璃、陶瓷等硬性材料的钻孔。

Then after thick, the essence two axle diameter localization drills the thread, the keyseat and the mill crank end surface.

机械加工工艺是规定产品或零件机械加工工艺过程和操作方法，是指导生产的重要的技术性文件。

Our products including End Mills, Machine Taps, Reamers, Center drills, Counterbore, Countersinks, Core drills, HSS tool bits and milling cutters.

公司产品包括：直柄、锥柄铣刀、丝锥、中心钻、倒角刀、扩孔钻、铰刀、锥钻、直钻及各类高速钢刀具。