The sin of Juda is written with a pen of iron, with the point of a diamond, it is graven upon the table of their heart, upon the horns of their altars.
犹大的罪是用铁笔记录下来的，用钻石尖刻在他们的心坎上和他们的祭坛角上。
2
The main products are Diamond Needle Files, Flat Files, Mounted Points, Wheels, Cutting Blades, Saw Blades, Mental Pen, Natural Diamond Wheel Blade, Diamond Grinding Paste etc.
On analyzing the features of applying gray relation to fault diagnosis, a gray relation principle was applied to identify diamond-pen blunt level on the dressing process of grinding wheel.