Because of china's weak economic base and its late start in terms of standards and regulations relating to the safety of individuals and family life, and the fact that many of the standards associated with them are lagging behind, it is safe not to increase or increase our physical safety in general. For example, china's standards for the quality of piped water require that the total hardness of imported water does not exceed 450 mg/l, but at this time the presence of large quantities of mineral ions continues to have a direct adverse impact on our lives and bodies (compared to the fact that europe and the united states require that the total hardness of municipal water supply should not exceed 150 mg/l, and that they still have extensive use of water treatment equipment such as filters, soft water machines (soft water) and pure water machines). Zhejiang sharp environmental technology co. Ltd. Is a high-tech enterprise focused on research and development, manufacturing and marketing...