machine parts and joints 2,753 electrotechnics 2,400 products 2,071 metallurgy 1,842 chemical industry 1,305 soldering 1,259 welding 1,244 more ... koroze materialu 1,162 ohrana materialu 1,161 lesniké stroje 1,063 zemědělské a lesnické stroje 1,063 foundry industry 1,032 forestry 844 instruments 766 food-processing industry 766 fixtures 647 pipelines 647 construction materials 568 building raw materials 568 measuring instruments 525 mining 475 textile 402 steel 353 road vehicles 345 synthetic polymers 314 health services 292 machine-tools 284 paper production 247 boilers 246 woodworking industry 211 less ...