... National-control Group company with 4 part factoriesMain products: drilling rig and drill bit, others: diamond, PDC, bush3. Certificate: ISO9001 ... , railway, road, port, bridge, water conservancy and hydropower, tunnel, well, industrial and civil construction2. Coal mining exploration, Ore exploration3. Small ... engine495D(26.5KW)ElectromotorY180L-4(22KW) water well drilling rig (KDY-300Y 300M depth)