Mixing installations of all kinds, in particular concrete mixing installations, namely, concrete mixers; conveyors for the construction industry, namely, belt conveyors; fixed mountable and convertible machines in the nature of pneumatic pumps, hydraulic pumps, namely, concrete pumps; machines in the nature of pneumatic pumps, hydraulic pumps, namely, concrete pumps for mounting on chassis, vehicles and crawler tracks; concrete distribution booms; crane booms truck-mounted concrete pumps, nam...