tetrabasic zinc chromate...
四盐基酸,
tetrabasic zinc chromate...
四盐基酸,
This paper has introduced the green-protection zincum-chromium coat, i n ianther word, it is "DACROMET" coat, it is one kind of liquid that confected from zincum flake alumimium flake chromate flake.
本文详细介绍了绿色环保型层即“达克罗”层,它是以片、铝片、酸盐等配制而成的溶液。
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