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For the stationary solitary magnetoelastic waves (magnetoelastic solitons) propagation along the equilibrium direetions of ferro-and antiferromagnetic vectors M and L in uniaxial crystals, exact solutions of coupled magnetization motion equations (Landau-Lifshitz) and elastic equations are obtained. The types of oscillations depending on the propagating velocity are determined. It is shown that velocity spectrum in the vicinity of sound velocity has a gap of magnetoelastic origin where oscillation character changes. Changing of oscillation type can also take place near the maximum propagating velocity of the magnetoelastic soliton.