<http://schema.org/keywords>
"valve, pipe, screw, Ventil, Rohr, Schraub, robinet, le tuyau, vis, v\u00E1lvulas, tubos, parafusos"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bibliocad.com/library/3d-eccentric-reducer-150-sch-40--6-x-4-y-6-x-3_27894>