atm = to_ATM(type->workingpressure); /* working pressure in atm */
volume = volume_of_air / atm; /* milliliters at 1 atm: "true size" */
type->size.mliter = volume + 0.5;
atm = to_ATM(type->workingpressure); /* working pressure in atm */
volume = volume_of_air / atm; /* milliliters at 1 atm: "true size" */
type->size.mliter = volume + 0.5;