BS-00089 - Part 4 - 1990; Direct Acting Indicating Analogue Electrical Measuring Instruments and their Accessories Part 4 Specification for Special Requirements for Frequency Meters
BS-00089 - Part 4 - 1990; Direct Acting Indicating Analogue Electrical Measuring Instruments and their Accessories Part 4 Specification for Special Requirements for Frequency Meters
- London BSI 1990
- 12p
/
/