Improvements in the construction of axial pumps and fans with sheet alps located next to the vertice of a cube of growing circular sections (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the construction of pumps and axial fans for the vehicle of fluids characterized because the impellers corresponding to said machines are equipped with sheet metal blades used next to the vertex of a cube of increasing sections. (Machine-translation by Google Translate, not legally binding)