1. Specification for mining type flameproof gate-end boxes. Gate-end boxes for direct-on-line motor starting (for use on 3-phase a.c. circuits up to 650 V) Part 1, (20th March 1969) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (22 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Specification for safety of household and similar electrical appliances. General requirements Part 1, (31st December 1969) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (74 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Specification for semiconductor devices of assessed quality: generic data and methods of test. (31st July 1969) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (428 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
4. Specification for semiconductor rectifier equipments. (28th February 1969) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗