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  2. 4-Aminodiphenylamine - Wikipedia

    en.wikipedia.org/wiki/4-Aminodiphenylamine

    4-Aminodiphenylamine is a diphenylamine with an additional amine substituent.This dimer of aniline has various industrial uses, including as a hair dye ingredient, but also has raised concerns about toxicity by skin contact. [1]

  3. Spacek SD-1 Minisport - Wikipedia

    en.wikipedia.org/wiki/Spacek_SD-1_Minisport

    The Spacek SD-1 Minisport is a Czech amateur-built aircraft, designed by Igor Špaček and produced by Spacek of Hodonín. The aircraft was also produced for a short time in the United States by SkyCraft Airplanes of Orem, Utah as a light-sport aircraft, but they had gone out of businesses by 2017. The aircraft is supplied in the form of plans ...

  4. SPPD - Wikipedia

    en.wikipedia.org/wiki/SPPD

    SPPD may refer to: Saint Paul Police Department , the abbreviation for the Saint Paul Police Department. St. Petersburg Police Department , the abbreviation for the St. Petersburg Police Department.