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| 27QA266 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| BS1806-427 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-427 | K7766 | BRITISH STANDARDS INSTITUTION |
| SP900-54 | U1068 | TRELLEBORG SEALING SOLUTIONS (UK)LTD |