PROPELLER DEVICE FOR LAND AND/OR MARITIME TRANSPORTATION BASED ON THE MAGNUS EFFECT
The present invention refers to a structure (1) of prefabricated staircase formwork for the manufacture of a stair section, which comprises: a first space (A) for containing a concrete pouring, which is defined by two longitudinal beam elements (11, 12) parallel therebetween, and two transversal bea...
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Sprache: | eng ; spa |
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