Main: mountaineering buckle, whistle, bottle opener, ball pen, half metal ball pen, etc. Mountaineering buckle aluminum, or iron, or stainless steel, there are a variety of shapes, such as egg, square, triangular and so on.
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The form of the tool used must exactly coincide with the profile of the thread to be cut, i. e. , triangular tools must be used for triangular threads, and so on.
使用的刀具外形必须正好与要切削螺纹的轮廓一致，即三角形刀具必须用于三角形螺纹等等。
So to study on improving the laser triangular measuring device's measuring precision and speed is of great practical value.
所以研究如何提高激光测微头的测量精度和速度有很高的实用价值。
You can see, the main and ventral arches are carved on both sides of Tong Shen ma Caiyun days, Yunlong, lotus, peony, and triangular geometric patterns and so on.
可以看到，主、腹拱的两侧通身都雕刻有天马彩云、云龙、莲花、牡丹以及三角几何等图案。
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