71. BS EN 60153-4. Hollow metallic waveguides. Part 4. Relevant specifications for circular waveguides (9th March 2021) 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) ↗
72. Community face coverings. Specification. (31st March 2021) 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) ↗
73. Elements of electrical and optical connection. Test methods. Dry heat Part 309, (15th January 1998) 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) ↗
74. Elements of electrical and optical connection. Test methods. Mechanical endurance Part 406, (15th November 1998) 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) ↗
75. Elements of electrical and optical connection. Test methods. Fluid resistance Part 315, (15th August 1998) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
76. Elements of electrical and optical connection. Test methods. Insert retention in housing (axial) Part 410, (15th November 1998) 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) ↗
77. Elements of electrical and optical connection. Test methods. Flammability Part 317, (15th August 1998) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
78. Elements of electrical and optical connection. Test methods. Artificial rain Part 313, (15th January 1998) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
79. Elements of electrical and optical connection. Test methods. Low air pressure Part 311, (15th January 1998) 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) ↗
80. Elements of electrical and optical connection. Test methods. Air leakage Part 312, (15th January 1998) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗