Direct Acting Indicating Analogue Electrical Measuring Instruments and their Accessories Part 8 Special Requirements for Accessories ( Fourth Revision )
Schedules for wrought steels: Part 2 carbon steels (Unalloyed Steels): Sec 1 wrought products (Other Than Wires) with specified chemical composition and related properties (First Revision)
Schedules for wrought steels: Part 4 alloy steels (Alloy Constructional And Spring Steels) with specified chemical composition andd mechanical properties (First Revision)