The key technique is how to control the adding quality of flocculating agent in the waterworks automation.
控制加入絮凝剂的多少是水厂自动化的关键技术之一。
Using BaCl2·2H2O and urea as raw material, adding control agent, different topography barium carbonate particles were synthesized by homogeneous precipitation method.
以二水氯化钡与尿素为原料采用均相沉淀法，通过添加控制剂合成不同形貌的碳酸钡粒子。
Prewetting of coal seams by water infusion is an essential measure for dust control at working faces. Adding of wetting agent is an important approach for improving water infusion.
煤层注水预湿是采煤工作面防尘的治本措施，添加湿润剂是改善煤层注水效果的重要途径。
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