Product certification carried out on conformity of production requirements of the PCT the USSR 1835-78 “Grape Stakes metal. TU. “Pp. 1.1, 1.2, 2.3 – 2.6, 2.11, 5.1, 5.2, T3 .. Certification held in SC “Kharkivstandartmetrologiya” – bodies operating product certification State Enterprise Kharkiv regional scientific and production center of standardization, metrology and certification.