The author has studied the operation of polymer as the flocculating agent, its molecular weight, charge density and inventory of polymer and its effects on the process of flocculation.
研究了高分子聚合物作为絮凝剂的使用特性以及高分子聚合物分子量、电荷密度、投加量的关系及对絮凝过程的影响。
Being honest and hard working, after two years the owner put him in charge of the accounts and the store's inventory.
两年后，由于工作勤快，为人忠厚老实，老板便开始让他负责看帐和管理店内进出货。
Being honest and hard working, after two years the owner put him in charge of the accounts and the store's inventory.
两年后，由于工作勤快，为人忠厚老实，老板便开始让他负责看帐和管理店内进出货。
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