91精品人妻无码,久久人人爽人人爽人人片,欧美寡妇性猛交XXX无码漫画,亚洲乱码一区二区三区在线观看_无,91麻豆产精品久久久久久夏晴子

PESA is a non-phosphor, non-nitrogenscale multivariate and green corrosion inhibitor. It has good scale inhibition and dispersion for calcium carbonate, calcium sulfate, calcium fluoride and silica scale, with effects better than that of ordinary organophosphines. When built with organophosphates, the synergism effects are obvious.

PESA has good biodegradation properties, it can be widely used in circulating cool water system in situation of high alkaline, high hardness and high pH value. PESA can be operated under high concentration index. PESA has good synergism with chlorine and other water treatment chemicals.