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antes de la prueba se desengrasará completamente la superficie interior del parabrisas con alcohol metílico o un producto desengrasante equivalente .
before the test, the inside surface of the windscreen shall be thoroughly degreased by means of methylated spirit, or an equivalent degreasing agent .
desengrasante petroleador ideal para la limpieza de piezas, motores, herramientas y maquinarias con suciedades grasientas, aceites y otras suciedades.
oil degreaser suitable for cleaning components, engines, tools and machines which have grease, oil and other dirt.