1. BS EN ISO 28921-1. Industrial valves. Isolating valves for low-temperature applications. Part 1. Design, manufacturing and production testing (13th April 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (33 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Components and systems of reciprocating internal combustion engines. Glossary of terms for valves, camshaft drive and actuating mechanisms Part 3, (30th December 1988) 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) ↗