1. BS EN IEC 61753-111-9. Fibre optic interconnecting devices and passive components performance standard. Part 111-9. Sealed closures for category S. Subterranean (15th May 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (31 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗