久久无码人妻一区二区三区午夜_久久久久精品久久久久影院蜜桃_亚洲综合欧美色五月俺也去_交换娇妻呻吟声不停中文字幕

BTA•Na can be absorbed on metal surface and form a thin film to protect copper and other metals. BTA•Na can be used together with many scale inhibitors and fungi disinfectants in circulating cool water system, and it has good corrosion inhibition effect in circulating cool water system. The dosage of 2-4mg/l is preferred. BTA•Na can also be used as anti-discolor agent, coating additive and luboil additive.