【经】 关税的负担

incidence of light incidence of taxation sector incidence of taxes incidence of stabilizer incidence (of criminal cases) incidence of unemployment equalization of incidence angle of incidence curve of moment against incidence incidence shifting of customs duty of incidence line plane of incidence incidence of poverty incidence of disability point of incidence incidence of tuberculosis incidence of hot spots points of incidence aerodynamic angle of incidence rate of incidence law of incidence