%0 Journal Article %T ANALYSIS OF MASSAGE DEVICE OPERATION ON THE BASIS OF PNEUMATIC ELEMENTS FOR HEIFER UDDER %A Kurochkin, A.A. %A Frolov, D.I. %K heifers, udder, massaging device, workable and operational diagram, combined massage, vacuum, pulse controller %J Bulletin Samara State Agricultural Academy %D 2021 %N 6 %P 6 %I Samara State Agrarian University