Liuzhou Guorui Machinery Co., Ltd. is a high-tech enterprise integrating the research and development (R&D), manufacturing and sale of machinery. Company products, with mature technology, stable and reliable quality, cost-effective, have GR60 series of GR6020、 GR6023, GR6030, GR6032, GR6038, GR6040. Liuzhou Great Machinery united with Guangxi Guorui heavy Industry in 2011. Leading by Professor Zhang Zhongfu, an expert entitled to special government allowance, a group of experts specializing in research and development of construction machinery formed our R&D team. We have developed and produced GR90 non-dig horizontal directional drills, GR80 multifunctional hammer drills and other series products. GR90 series are composed of GR9018, GR9028, GR9038, GR9050, GR9060, GR9120, GR9200, GR9300, GR9400, GR9500 and other models, all of which are applied successfully in non-dig pipe-laying projects in communications, power, gas, running water, rain water, sewage, thermal, petroleum, petrochemical and other sectors. As a series of high-tech products, GR80 multifunctional hammer drills had been put into production, which put an end to the dependence on foreign equipment manufacturers.