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| BS1806-425 | K7766 | BRITISH STANDARDS INSTITUTION |
| DEFSTAN02-337-425-MN80 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BSM48-425 | K7766 | BRITISH STANDARDS INSTITUTION |
| JW24000-53BA5 | U2164 | JAMES WALKER & CO LTD |
| JW24000-53BA5 | U8616 | JAMES WALKER & CO LTD |
| NES 337 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-1984 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-425-MN80 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
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