CUG ZHONGYI TECHNOLOGY DEVELOPMENT CO,.LTD, supported by China University of Geosciences, is a professional rock drilling tool R&D and manufacturing company in China.Our main products are various ranges of integral drill steels, tapered rock drilling bits, thread rock drilling bits, extension rods, shank adapters, coupling sleeves and down-the-hole equipments (hammers, bits, tubs and fittings) which are widely used in rock drilling engineering such as mining, hydroelectric engineering and tunnel excavation.
