P
Polímers  [2]
Polímers en medicina  [1]
Polymeric composites  [1]
Polymers  [2]
Polymers in medicine  [1]
Poultry industry -- By-products  [1]
Productes químics -- Normes -- Unió Europea, Països de la  [1]
R
Rajoles -- Indústria i comerç  [1]
S
Sewage -- Purification  [1]
Sewage -- Purification -- Biological treatment  [1]
Sewage -- Purification -- Catalonia -- Torelló  [1]
Sewage disposal plants -- Catalonia -- Torelló  [1]
Sewerage -- Catalonia -- Arbúcies  [1]
Sewerage -- Maintenance and repair  [1]
Soil pollution  [1]
Sòls -- Contaminació  [1]
Steam-boilers  [1]
Superconductors d'alta temperatura  [1]
Surface active agents  [1]
Suro  [1]
Swimming pools -- Air conditioning  [1]
T
Tile industry  [1]
V
Valves -- Design  [1]
Valves -- Materials  [1]