标准号:IS 4454 Pt.2-1975
发布日期:1975/6/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围: This standard ( Part II) covers requirements for two grades of oil hardened and tempered spring steel wire and valve spring wire ( unalloyed) used for general purposes and for highest dynamic stressed springs.