copper oxide แปลว่า
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Copper oxide: can form a brown color with uniform appearance.
Step 1: Mix a spatula with iron filings and copper oxide in a test-tube. Study the mixture.
brown-black copper oxide. In contrast to the oxidation of iron by wet air, this oxide layer stops any further, bulk corrosion.
Product Description: 1. Make use of imported copper oxide, use special molding machine to process, the tip size very precise; 2. Lead-free alloy iro...More