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。
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。
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.
一种电动卷笔器，玩具电动机经齿轮减速装置与一中部为锥形，两端为空心圆筒的多刀刃卷笔刀筒机械连接。小砂轮套装在玩具电动机轴上。
Loose pieces of casing around the centres of the SZ-cutter.
松套管围绕中心加强件SZ层绞。
Loose pieces of casing around the centres of the SZ-cutter.
松套管围绕中心加强件SZ层绞。
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