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Methyl fluorosilicone oil is polymerized from fluorosilicone monomers, and the two ends of its molecule are organic silicon modified materials with hydroxyl groups.
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A GI sheet (Galvanized Iron sheet) refers to a sheet of steel that has been coated with a layer of zinc through a process called galvanization.
The steel coil undergoes hot-dip galvanization, where it is immersed in a bath of molten zinc.