“FRAC”簡單造句，FRAC造句子

FRAC(Fractionator Reflux Analog Computer)

DETERMINATION OF THE VAPOUR-LIQUTD EQUILIBRIUM CONSTANTS OF NARROW FRAC(?)NS OF DAQING,SHENGLI AND HUABEI CRUDE OILS AT HIGH PRESSURE AND VERIFICATION OF MATHEMATICAL MODELS

RESEARCH AND APPLICATION OF LOW DAMAGE FRAC TECHNOLOGY FOR LOW PERMEABILITY AND TIGHT GAS FIELD IN WESTERN SICHUAN