The grind sharpened Angle of tungsten electrode, the diameter of end face and welding parameters that are important for welding are introduced from theory to application.

对与焊接至关重要的钨极高磨尖角度、端头直径，焊接规范参数从理论到应用予以介绍。

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Inside, the 318-year-old high-end knife company, called Burza, meticulously handcrafts gorgeous artisan knifes fashioned from Austrian steel and sharpened with Swiss diamonds.

BBC: Tiradentes: The culinary goldmine of Brazil