hubieran fabricado
-they/you had fabricated
Past perfect subjunctiveellos/ellas/ustedesconjugation offabricar.

fabricar

Si las barandillas se hubieran fabricado con madera de coníferas en lugar de madera contralaminada de frondosas, hubieran tenido menos de la mitad de resistencia.
If the balustrades had been made of softwood rather than hardwood CLT, they would have had less than half the strength or stiffness.
Aunque el tamaño de las cámaras era suficiente para utilizarlas en la fabricación de motores mayores capaces de lograr alcances superiores a los 150 kilómetros, no se encontraron pruebas de que se hubieran fabricado.
Although those chambers were large enough for the production of larger motors that could provide ranges of more than 150 km, no evidence was found that such production had occurred.
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