Have usually required a large amount of water discharge, if they can not deal with the water right, mining can not be carried out.Ola Hallgren give us some guidance.

• 耐磨蚀性的潜水泵总是最佳选择，因为它们可以在极端恶劣的条件下运行，而露天采矿的条件通常非常恶劣。