<http://schema.org/keywords>
"pipes, valves, Rohr, Ventil, tuyau, soupape, tubula\u00E7\u00E3o, a v\u00E1lvula"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bibliocad.com/library/3d--llave--brida--te--curva_9359>