Founded in 1958, HuNan TianYing Technology Group Co.,ltd is a profession mining tools manufacture. We locate at Zhuzhou city-a famous heavy industrial base of China, Own 800 acres land area with total asset of RMB8130 million and over 300 staffs. We occupy more than 300sets advanced full-equipped machinery and tools and the annual production volume of tri-cone bits and light-duty drilling tools are 5000pcs and 3200000 pieces respectively. For the other rock drilling tools, the annual production ...