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Super Duplexroestvrij staal 2507 ASTM A790 UNS S32750/1.4410 naadloze buizen2023-05-24 11:36:46 |
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ASTM B729 legering 20 / UNS N08020 / 2.4660 naadloos nikkel legeringspijp2025-03-05 18:04:28 |