【经】 普通优惠制

generalized preferential system； general system of preferences general manager responsibility system general election system theory of asset preference preference significance of selling activities for consumer preference order of root system plugging of catalyst system optimization of system design order of system multiplication of system features of system selective system of preference preference system Commonwealth Preference System British preference tariff system general system transitivity of preference law of color preference assignment of with preference interpersonal comparison of preference margin of preference assessment of time preference