标准号:IS 4531-1968
发布日期:1968/5/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standard lays down the basic requirements of two types of swivels using ball bearings and plain bearings respectively (see sketches in Table 1 ).1.1.1 Provision is made for special swivels in Appendix B.