Analysis of the mechanism of the interaction of operational columns with the environment of breeds and development of the technique of their design - R. A. Gasanov; Sh. Kh. Bekirov; A. R. Gasanov; A. I. Zejnalov; D. R. Gasymova; T. A. Aslanov; Sh. S. Musaev (Tooling materials science, 2019)