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pinjie company provides fluorine-free aluminum bright cleaning agent, low-temperature polishing agent, yellow smoke inhibitor, tin nickel double-salt coloring additive, single tin salt coloring additive, nickel-free sealing agent, acidic oil removal agent, fluorine-free degreasing agent, acidic degreasing agent, chromium-free chromium-free chromium-free sulphate, nickel sulfate, nickel fluoride, and other auxiliary chemical raw materials for surface treatment of a series of aluminum profiles.

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