The bevel milling cutter for cutting groove of oil casing - pipes was designed.
设计了用于油气田管道坡口切割的角度铣刀。
2
The bevel milling cutter for cutting groove of oil casing-pipes was designed.
设计了用于油气田管道坡口切割的角度铣刀。
3
An electric pencil sharpener USES a toy motor as power and is composed of conic casing with tubular ends, multi-edge cutter for wooden part and a small abrasive wheel for lead core.