machine parts and joints 2,820 electrotechnics 2,401 products 2,076 metallurgy 1,899 chemical industry 1,310 soldering 1,293 welding 1,293 more ... koroze materialu 1,174 ohrana materialu 1,173 lesniké stroje 1,136 zemědělské a lesnické stroje 1,136 foundry industry 1,033 forestry 959 instruments 823 food-processing industry 766 fixtures 679 pipelines 679 construction materials 568 building raw materials 568 measuring instruments 531 mining 475 textile 404 steel 360 road vehicles 351 synthetic polymers 314 machine-tools 311 health services 292 paper production 251 boilers 248 tools 212 less ...