prov:value
| - Among the useful metal catalytic components and metal sensing components are those selected from components of the tins, the rare earth metals, certain other catalytic components and mixtures thereof, in particular catalysts containing gold, silver, copper, vanadium, chromium, cobalt molybdenum, tungsten, zinc, indium, the platinum group metals, i.e., platinum, palladium and rhodium, iron, nickel,
|