Shandong Sanshan Group Co., Ltd., founded in 1993, is rock drilling and mining equipment research and production of professional enterprise, is "high-tech enterprises in Shandong Province", "national torch plan project implementation units", "Chinese patent star enterprise in Shandong Province", "township enterprises in China a focus on brand-name enterprises", "AAA grade credit enterprise, the country's largest production base of the drill bit, the overall strength among th