Silos not of metal; fermentation vats not of metal; chimneys not of metal; water-pipe valves, not of metal or plastic; partitions, not of metal for building; formwork tables, not of metal, for concrete; water pipes, not of metal; ducts, not of metal, for ventilating and air-conditioning installations; portable buildings, not of metal; manhole covers, not of metal; gutter pipes, not of metal; foundry molds, not of metal for forming cement posts for building, wall panels not of metal for buildi...

Silos not of metal; fermentation vats not of metal; chimneys not of metal; water-pipe valves, not of metal or plastic; partitions, not of metal for building; formwork tables, not of metal, for concrete; water pipes, not of metal; ducts, not of metal, for ventilating and air-conditioning installations; portable buildings, not of metal; manhole covers, not of metal; gutter pipes, not of metal; foundry molds, not of metal for forming cement posts for building, wall panels not of metal for buildi...