... ISO9001:20084. Main market: South America, Africa, the Middle East, AisaCountries: South Africa, Zambia, Sudan, Iran, South Korea, Costa Rica etc Drilling ... e.g. prospection, railway, road, port, bridge, water conservancy and hydropower, tunnel, well, industrial and civil ... Coal mining exploration, Ore exploration3. Small hole diameter water well drilling4. Geothermal pipe-installing for heat pump5. ...