DIN 765:2023-10 圆钢环链 4 级圆钢环链，采用调质优质钢制成，光亮/注：发行日期 2023-09-01*旨在替代 DIN 765 (1955-

DIN 765:2023-10 圆钢环链 4 级圆钢环链，采用调质优质钢制成，光亮/注：发行日期 2023-09-01*旨在替代 DIN 765 (1955-03Round steel link chains - Round steel link chains, grade 4, from quenched and tempered quality steel and bright / Note: Date of issue 2023-09-01*Intended as replacement for DIN 765 (1955-03).