... e.g. prospecting, railway, road, port, bridge, water conservancy and hydropower, tunnel, well, industrial and civil construction ... . Certificate: ISO9001:20083. Export to: Africa, the Middle East, South America, Asia, Countries: South Africa, Zambia, Sudan, Iran, South ... structure. Technological Data of Drilling Rigs: ModelHGY-300 Water Well Drilling MachineDrilling depth( m)300Drilling rod diameter ...