method by wich the net volume of liquid collected is deduced from measurements of liquid levels (i.e. gaugings), made respectively before and after the liquid has been diverted for a measured time interval into the gauging tank, to determine the volume contained in the tank, meetod, mille abil tuletatakse kogutud vedeliku maht vedelikutaseme mõõtmisest, mis on tehtud vastavalt enne ja pärast vedeliku suunamist mõõdetud aja jooksul mõõtepaaki, et määrata kindlaks paagis olev maht, technique in which the net volume of fluid collected is deduced from measurements of liquid levels made respectively before and after the fluid has been diverted for a measured time interval intowhile the fluid flow is being delivered into the calibrated measuring tank