The work scientifically substantiates the use of an effective technology for increasing the wear resistance of cylindrical parts. using the example of protective sleeves of cantilever pumps. due to electromechanical surface hardening. A review of research was carried out and it was established that the achievement of the highest values of microhardness of the surface layer at a depth ... https://www.ealisboa.com/mega-sale-Sol-Sunguard-Altitude-Sunscreen-1-5oz-big-savings/