System of coupling two tubes that cross (Machine-translation by Google Translate, not legally binding)
ES280527A3
Improvements in the open beams of plate, especially for the transparency of a forming beam (Machine-translation by Google Translate, not legally binding)
ES280016A1
Improvements in descomponible interface beams intended especially for purpose purposes (Machine-translation by Google Translate, not legally binding)
GB971517A
Girder,particularly for supporting shuttering
ES277760A1
Improvements improved in the shape framework (Machine-translation by Google Translate, not legally binding)
