In the paper we determine the transient magnetic field in a conducting cylinder placed in external longitudinal sine-shaped magnetic field using the solution of Bessell equation in cylindrical co-ordinates. and also applying integral Laplace transformations. attenuation and diffusion of the magnetic field strength in the cylinder. The resulting equations can be used to describe volume... https://www.macorners.shop/product-category/engraved-leather-wallet_new/