Goodkym Technology Co., Ltd was dedicated to the development of cutting and grinding of metal and non-metal material for 20 years. In 2003, we started to study and develop ecological machinery due to the importance of environment protection that is emphasized worldwide year by year. We have engineered, installed and serviced state-of-the-art machinery of wood waste shredder & crusher ; this machinery is able to convert wood waste into scraps both fine and coarse particles. Our crushers combine a new concept of design which can attach different kinds of accessories for different purposes plus the function of 4- wheel drive and 4- wheel steering. It is really a unique and multiple function machinery in the nation. The blades and the key technology self-developed, in the future, will be combined with the other mechanisms of 4 wheel to design environmental products with highly efficient mobility function.