Как маркируется бесшовная стальная труба?

Труба стальная бесшовная (SMLS) is an important type of steel. Предотвратить деформацию стальных бесшовных труб при термообработке можно следующими методами., seamless steel pipes should also be numbered in the process of production and use. Only when the numbering is properly marked will the performance of the seamless steel pipe be better brought into play. There are also many problems to be paid attention to in…