関連ワード:  steady state and unsteady state    steady state and unsteady state difference    steady state and unsteady state heat conduction    steady state and unsteady state heat transfer    steady state and unsteady state diffusion    steady state and unsteady state example    steady state and unsteady state conduction    steady state and unsteady state flow    steady state and unsteady state relative permeability    steady state and unsteady state mass transfer