"2" . "2" . . "SDN:P07::CFSN0540" . "accepted"@en . "SDN:P07::CFSN0540" . "false" . . "" . "mass_fraction_of_ozone_in_air"@en . "Mass fraction is used in the construction mass_fraction_of_X_in_Y, where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X)."@en . . . "2008-04-15 14:00:00.0" . . . . . "SDN:P07::CFSN0540" . . . . "2008-04-15 14:00:00.0" .