Abstract: Field of technology: Water electric heaters with resistive heating elements immersed in water. Problem to be solved: Increasing the heat-emitting surface, efficiency and power output of the heating element in order to minimize heat loss and optimize the operating temperature of the heating element immersed in water. The essence of the invention: The resistive conductor of the heating element is made of a thin resistive tape (4), the perimeter of the cross-section of which exceeds mainly more than twice the perimeter of the cross-section of a round wire of equal cross-sectional area. The spiral from of tape 4 has a thermally conductive dielectric coating 5, is wound on a carcass of thin-walled cylindrical pipe 3 and forms, respectively, the external and internal heat-emitting surfaces of the heater. On both sides of the heat-emitting surfaces of the heater, gaps 11 are formed for the flow of the heated fluid.

Abstract: The multitier facility for vehicle parking according to this invention comprises a main parking platform located on each tier, and an intertier elevator for delivering a vehicle to a required tier. The elevator has a rectangular-shaped load-receiving platform, a facility for horizontal movements of vehicles with the aim of placing them on the parking platforms and removing from them. Also included is a device for changing the direction of these movements.

Abstract: The vehicle with controlled running wheels according to this invention comprises a steering system with a reference-unit element and units for matching of wheels turn angles. Each of the matching units incorporates a tracer pin and guide slot. The number of guide slots is equal to the number of controlled wheels. The tracer pin cinematically connected with the reference-unit element, and each guide slot—with the appropriate wheel. All set-point devices are located equidistant to each other and have a common axis of a turn. The tracer pin is hinged on an axis of a turn of set-point devices, with a capability of the turn in any of several planes.