451. Apparatus with one or more particular functions for connection to public switched telephone networks run by certain public telecommunications operators. Specification for apparatus with call barring facilities Part 7, (30th November 1988) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
452. Cinematography. Common to more than one film gauge. Sound. Method for measurement of the signal to noise ratio of 8 mm type, 16 mm and 35 mm variable area photographic sound records Part 5.4.6, (30th December 1988) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
453. Harmonized system of quality assessment for electronic components. Sectional specification: fixed metallized polycarbonate film dielectric capacitors for direct current. (30th June 1989) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (34 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
454. Electrical installations for open-cast mines and quarries. Recommendations for equipment and ancillaries Part 3, (30th September 1988) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
455. Specification for radio interference suppression filters of assessed quality: generic data and methods of test. (29th February 1988) 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) ↗
456. Harmonized system of quality assessment for electronic components: sectional specification: analogue monolithic integrated circuits. (29th February 1988) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (82 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
457. Specification for safety requirements for the construction and the installation of equipment for resistance welding and allied processes. (30th November 1989) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
458. Specification for safety of household and similar electrical appliances. General requirements Part 201, (30th March 1990) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (250 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
459. Guide to electrical earth monitoring and protective conductor proving. (31st December 1989) 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) ↗
460. Specification for non-incendive low voltage control/interlock and low voltage earth fault monitoring circuits for use in mines. (28th February 1990) 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) ↗