81. Specification for ballasts for discharge lamps (excluding ballasts for tubular fluorescent lamps). (30th April 1982) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (67 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
82. Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators. Specification for private branch exchanges with terminating stations treated as an entirety Part 2, (1st September 1998) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (19 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
83. Specification for capacitors for use in tubular fluorescent, high pressure mercury and low pressure sodium vapour discharge lamp circuits. (31st January 1979) 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) ↗
84. Specification for on-load tap-changers. (31st October 1978) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (32 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
85. Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators.Facilities on private branch exchanges. Specification for facilities on private branch exchanges with terminating stations treated as an entirety Part 5-5.1, (30th September 1988) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (40 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
86. Specification for klystrons of assessed quality: generic data and methods of test. (28th September 1979) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (53 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
87. Method for assessment of resistance of materials used in protective clothing to molten metal splash. (29th April 1983) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (11 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
88. DTE/DCE interface connectors and pin assignments. Specification for 37-pin connector [identical with ISO/DIS 4902 and DAD 1] Part 2, (31st January 1986) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (25 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
89. Specification for controlgear for voltages up to and including 1000 V a.c. and 1200 V d.c. Contactors Part 1, (31st March 1988) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (59 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
90. Medical electrical equipment. Particular requirements for safety. Specification for high frequency surgical equipment Part 2-2.2, (31st May 1983) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (30 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗