绝对准确！： In recent years， china's mines in improving the drainage plan and improve the drainage， sewerage stability has also done a lot of as the coal production safety requirements， the drainage system of security and reliability at present well as the water discharge of the main labor safety management system， a precarious ever， the operation of equipment and economy by the people of the operations and equipment and other therefore， the automatic control system has an important meaning 希望采纳！
