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| NORHEIMSUND ELEKTRO AS | 981187474 | KVAM |
| NORICKON SERVICE AS | 930594504 | OSLO |
| NORMA GEOSYSTEMS AS | 825831622 | ASKER |
| NORMAN BYGG AS | 999506771 | BERGEN |
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| NORNES BETONG AS | 928724166 | VOSS |
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| NORPRODUKTER - MILJØ AS | 938146101 | OSLO |
| NORPRO ENTREPRENØR AS | 933058204 | SARPSBORG |
| Norprosjekt A.S. | 946351032 | OSLO |
| NORRMAN SPRINKLERKONTROLL AS | 926088734 | SKIEN |
| NORRØN BETONG AS | 930010170 | HÅ |
| NORSIA RØR AS | 985633797 | BODØ |
| NORSJØ ARKITEKTER AS | 995711664 | MIDT-TELEMARK |
| NORSKAND PROSJEKT AS | 912785920 | MOSS |
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| NORSK BYGGSERVICE AS | 980381587 | LARVIK |
| NORSKE BÆRESYSTEMER AS | 996808548 | OSLO |
| NORSKE FJELLHUS AS | 984280696 | FLESBERG |
| NORSK EL-ENTREPRENØR AS | 956109426 | OSLO |
| NORSKE METALLFASADER AS | 876933322 | STANGE |
| NORSK ENERGI | 945469277 | OSLO |
| NORSK ENERGIANALYSE AS | 998562619 | STRAND |
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| NORSK MILJØSERVICE AS | 912524698 | SYKKYLVEN |
| NORSK MODUL AS | 918716505 | BAMBLE |
| NORSK PUMPESERVICE AS | 934814185 | LILLESTRØM |
| NORSK RIVING AS | 815538412 | BERGEN |
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| NORSK SKADEKONTROLL AS | 824487332 | ØYGARDEN |
| NORSK SPENNBETONG AS | 980884953 | SANDNES |
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| NORSK TEKNISK INSTALLASJON AS | 996099881 | LIER |
| NORSK VVS EKSPERT AS | 916583729 | LILLESTRØM |
| NORST AS | 911755084 | ÅLESUND |
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| NOR TEAM ENTREPRENØRFORRETNING AS | 929079272 | SENJA |
| NORTEK ELEKTRO AS | 977076153 | ÅFJORD |
| NORTEKK AS | 963772459 | LILLESTRØM |
| NORTEK SECURITY & TECHNOLOGY AS | 995173743 | DRAMMEN |
| NORTHERM SERVICE AS | 920503527 | ASKER |