Tested, in five percent concentration of hydrochloric acid, more than 95 hours to react (ordinary copper-free silver mirror less than 30 hours to react) antioxidant performance than the traditional copper-free silver mirror to enhance the three times, is…
Tested, in five percent concentration of hydrochloric acid, more than 95 hours to react (ordinary copper-free silver mirror less than 30 hours to react) antioxidant performance than the traditional copper-free silver mirror to enhance the three times, is…