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      The graphic structure consists of three "big" words and two concentric circles at 120 degrees, and the main color is blue. The "three" brand logo was designed in March 1952, at the beginning of the design, the "three" represents the three main products of the company at that time, which are: carbide cutting tools, various balls, small stainless steel. "Da" means "Dalian". The small circle in the center represents steel and iron particles, and the company's products are mainly round steel. The standard color of the logo is blue. Blue is the color of the sky is the color of the sea, it represents the enterprise's extensive and profound cultural heritage and infinite broad prospects for development.