Diesel electric generators; Electric generator plant; Engine driven generators; Generators; Welding current generators; Apparatus for mixing concrete; Concrete mixers (machines); Concrete pumps (machines); Concrete spraying machines; Hydraulic breakers for concrete breaking; Machines for forming concrete panels; Machines for the treatment of concrete; Mechanical mixers for concrete; Centrifugal water pumps for domestic purposes; Engine driven water pumps; High pressure washers; Agricultural implements, being trailer mounted; Spraying machines in the form of trailers; Diesel engine driven pump sets; Air compressors; Diesel engine air compressor sets; Rotary air compressors; Waste compaction apparatus (machines)