相互需求法则

demand of reciprocal of ohm reciprocal of oil mobility reciprocal letter of credit reciprocal exemption of taxes weakness of demand lack of demand principle of effective demand swings of demand concept of consumer demand pattern of demand autonomous expansion of demand law of reciprocal proportion law of reciprocal innervation law of reciprocal proportions law of elastic demand law of diminishing demand law of demand law of elasticity of demand reciprocal demand law of supply and demand law of demand and supply Maxwell's law reciprocal deflection