‘particulate matter’ or ‘PM’ means the mass of any material in the gas emitted by an engine that is collected on a specified filter medium after diluting the gas with clean filtered air so that the temperature does not exceed 325 K (52 °C);
ciallaíonn “ábhar cáithníneach” nó “PM” mais aon ábhair sa ghás a astaítear ó inneall a bhailítear ar mheán sonraithe scagaire tar éis an gás a chaolú le haer glan scagtha ionas nach sáraíonn an teocht 325 K (52 °C);