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. special wax for road marking paint 1 advertising and marketing 30 strip