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what’s the Nitric Acid

Nitric acid (HNO₃) is a colorless liquid with yellow or red fumes with an acrid odor. Exposure to nitric acid can cause irritation to the eyes, skin, and mucous membrane; it can also cause delayed pul...
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What’s the sand blasting?

The process of cleaning and roughening the surface of the substrate by utilizing the impact action of high-speed sand flow. Using compressed air as a force to form a high-speed jet to spray material (...
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