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ES339962A1967-04-281967-04-28Perfeccimientos en la fabricacion de piezas de mortero y hormigon de cemento conseguidas con maquinas automaticas.
ExpiredES339962A2
(es)
Metodo de fabricacion de piezas moldeadas a base de cementou hormigon, utilizando moldes perdidos, que quedan incorpo- rados a la pieza como embalaje protector.
Procédé pour la fabrication de résines coulées à durcissement rapide à base dephenol et de formaldéhyde, et les objets coulés francs de tension, obtenus de cellesci