21. Transportable gas container valves. Valves with taper stems (excluding valves used for breathing and medical purposes) Part 1, (17th October 1962) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (46 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
22. Transportable gas container valves. Valves with taper stems for use with breathing apparatus Part 2, (19th March 1963) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (26 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
23. Tyres and wheels. Valves. Tyre valve threads 9V1, 10V2, 12V1 and 13V1 Part 3.3, (31st March 1980) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗