Machines and mixers for building designed for buildings and public works in the nature of concrete and dry mortar mixers, screw pumps, conveyors and cutting machines; machines for projecting coatings on exteriors and interiors designed for buildings and public works in the nature of spraying machines; handling facilities in the nature of handling machines, namely, pneumatic pumps for pumpable lime based and cement based ready-mixed dry mortars, wet building materials, pasty building materials and liquid media for building purposes and mainly consisting of compressors, worm screw pumps, rotors and stators, as well as pneumatic screw conveyors; mechanically driven tools and apparatus used for resurfacing, building walls and applying screed in the nature of ground and wall surface finishing and compacting machines and concrete and mortar construction machines; valves functioning automatically by electric current and by change of physical conditions in the nature of valves being parts of machines operated pneumatically and by air and valves as machine components, primarily intended for the above machines and installations