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| 27FR3097 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| BS1806-344 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-344 | K7766 | BRITISH STANDARDS INSTITUTION |
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| 27QA265 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| SP900-47 | U1068 | TRELLEBORG SEALING SOLUTIONS (UK)LTD |