This article describes the dynamic processes within the gun barrel during the firing process in exploitation. It generally defines the basic principles of constructing tube elements. and shows the distortion of the basic geometry of the tube interior due to wear as well as the impact it causes during exploitation. The article also defines basic empirical models as well as a model base... https://www.bekindtopets.com/huge-sale-UT-Solution-Gel-for-Cats-super-grab/