It is shown that the criterion of incompressibility applicable to any medium, contradicts to the real meaning of this term. On the basis of expression of speed of sound in inhomogeneous medium and generalized equation of continuity of mass obtained in papers [1,2] respectively, it is proved that so called internal gravitation waves do not exist in nature. This concept appeared as a result of incorrect interpretation of incompressibility of medium. Correct understanding of criteria of compressibility or incompressibility leads to qualitatively new understanding of homogeneity or heterogeneity of medium, in particular—only strongly inhomogeneous medium can be incompressible while weakly inhomogeneous medium is always compressible. Besides, it is shown that in inhomogeneous media additional terms are added to known hydrodynamic (gas dynamic) correlations applicable to any medium which disappear at transfer to homogeneous model of medium.
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机译：Etude Experimentale et Theorique de l'Ecoulement autour d'un profil d'aile muni d'un spoiler d'Extrados en Regime Incompressible;对传感器和激光测量仪的研究（在不可压缩流动中使用Extrados扰流板进行翼形剖面流动的实验和理论研究;激光测速仪和DVORaK方法的贡献）（实验室研究和实验室研究） Inkompressiblen Bereich.Untersuchung der Laservelozimetrie und der DVORaKschen methode）
机译：放射源中伽马辐射的确定方法u 1 044 044 044 044 u u u u determination of determination of of of of of determination of of determination of of determination determination of
