逛超商時看到的美女
Sodium polyacrylate - Wikipedia, the free encyclopedia哇......她不冷嗎? Sodium polyacrylate, also known as waterlock, is a sodium salt of polyacrylic acid with the chemical formula [-CH2-CH(COONa)-]n and broad application in consumer products. It has the ability to absorb as much as 200 to 300 times its mass in water. Sodium ...
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