pumps [machines]; water pumps; pumps, electric; water supply machines [pumps]; pumps being parts of machines, motors and engines; pumps as parts of machines, motors and engines; electric pumps; electric water pumps; electrical water pumps; positive displacement pumps; pump diaphragms; pump impellers; suction pumps; rotary pumps; vacuum pumps; screw pumps; sump pumps; water pumps for swimming pools; rotary lobe pumps; sludge pumps; circulating pumps; mine drainage pumps; centrifugal pumps; controlled volume pumps; sludge pumps for the petroleum industry; diffusion pumps; silt pumps; macerator pumps; electric pumps for swimming pools; multiphase screw pumps; electrical water pumps for swimming pools; electric water pumps for swimming pools; centrifugal water pumps for domestic purposes; submersible pumps; water pumps for showers; axial-flow pumps