Abstract: The offered engineering solution (technology) belongs to the food industry —particularly, to the wine industry —and can be used for riddling (dead yeast cells are accumulated in the neck of the bottle) during champagne production (wine production according to the champagne method). The Equipment allows maintaining the equal slant angle for the large number of wine bottles during their repeated revolving. The Equipment has a frame and at least one revolving platform for bottles; moreover, the platform is designed in the form of a disc with holes. Every hole holds a case for a bottle. The Equipment production and exploitation are not difficult, it is reliable, has a great productivity, and guarantees the control of riddling in every bottle at any process stage.

Abstract: An impeller of an axial-flow fan comprises a hub which carries blades installed thereon with the aid of attachment fittings in the form of a swivelling base with an extension. Each of the swivelling bases supports at least two blades. The distance between the blades installed on a single base varies from 0.15 to 0.3 .alpha. where .alpha. is the angular distance between the pivots of the adjacent swivelling bases. The blades installed on a single base are rigidly secured thereto at one end and joined to each other by a connector at the other end, thus forming a rigid system.