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BRAZIL ACAI 20X

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The study for exotic topological effects of sound has attracted uprising interests in fundamental physics and practical applications. Based on the concept of valley pseudospin. we demonstrate the topological valley transport of plate-mode waves in a homogenous thin plate with periodic stubbed surface. where a deterministic two-fold Dirac degeneracy is form by two plate modes. https://parisnaturalfoodes.shop/product-category/brazil-acai-20x/
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