Scale in industrial circulating cooling water - determi copper - atomic absorption spectrometry 工业循环冷却水水垢中铜含量的测定原子吸收光谱法
Dolomitic lime has a higher neutralising power compared to high calcium lime and impedes scaling 白云石石灰有较高的中和能力且不容易生成水垢。
Can be dismantled conveniently by users while filtering the network , wash , prevent the scale from assembling 过滤网可由用户方便地拆卸，清洗，防止水垢聚集。
Testing method for corrosion and scale inhibition performance of water treatment additives in cooling water system 冷却水系统中水处理添加剂腐蚀及水垢抑制性能的试验方法
The skin is smooth , tender and velvety after showering . there is no scale like tiny grit to jam the pores of the skin 沐浴后肌肤光滑柔嫩，自然亮泽，不会再有象细小沙砾一样的水垢堵塞毛孔。
Coordinate with advanced equipment to effectively eliminate rust , greasy filth and scale in cooling system , prevent engine from overheating 配合设备有效清除冷却系统内部锈迹，油泥和水垢，防止发动机过热。
The difference of liquid levels between the direct contact heat exchanger and the depositing pool is used as the diving force of the water flow 同时采用简单的热力净化方式既防止水垢堵塞蒸汽管道又简化了装置。
They help remove tarnish and other corrosion from metals ; they also remove hard water deposits , and discoloration and corrosion from metals 它们可用于去除金属制品的污垢和锈蚀，使其恢复光泽，也可以除去硬水的水垢。
Experts say water dispensers without internal steel heating tanks work on the same principle as current models and are also subject to furring 专家说，没有内部钢制加热水箱的饮水机和目前普遍使用的饮水机有相同的工作原理，因此也容易生发水垢。
Material , surface and structure design of heating tube imported enable water scale fall off automatically at felicity conditions which prolong service life of heater much 吉之美采用英国进口加热管，其材质选择及表面与结构设计可使加热管上的水垢在适当条件下自动脱落。
