IS 6440-1972

标准号：IS 6440-1972
发布日期：1972/8/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：Specifies requirements for quick-action drilling jigs and associated components like drill plates and base plates. The following two types of quick-action drilling jigs are covered in this standard:Type A — Over-hang type for nominal sizes 80 x 50 mm and 125 x 90 mm Type B — Bridge type for nominal sizes 200 x 160 mm and 300 x 190 mm