1. Our designers proposed a triangle theory of bridge structure, that successfully resolved the problem of brace strength, but the frequency interference problem was still not resolved.
2. Our designers kept firm and indomitable, kept on carving, in 2009, our designers relied on the “main position of vibration” and the “honeycomb acoustic panel”, successfully resolved the problem of frequency interference
3. We called the above technology invention the “triangle punched brace”