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Chemical agent for use in etching the surface of aluminum and aluminum alloys; degreasing agents for aluminum materials and for industrial use; metal plating chemical compositions, namely, electrolytic acid aluminum solutions; auxiliary fluids for use with abrasives for general industrial use; metal and plastic plating chemical compositions; chemicals for the treatment of wastewater; chemical coatings used in the manufacture of printed circuit boards; chemical additives for use in the manufacture of electronic components; coatings used in the manufacture of printed circuit boards; metal etching mordants; industrial chemicals