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 | Firma | Ort | Produkte |
 |
 3i-isolet s.r.o. | CZ–11000 Praha 1 | 2 |
| |
i+R Fensterbau GmbH | A–6923 Lauterach | 3 |
| |
i+R Fensterbau GmbH | A–6923 Lauterach | 5 |
| |
International Coating Products | F–01150 LAGNIEU | 2 |
| |
Internorm International GmbH | A–4050 Traun | 49 |
| |
INTERPANE Glas Industrie AG | D–37697 Lauenförde | 2 |
| |
Isele Ernst | A–6890 Lustenau | 3 |
| |
ISOCELL GmbH & Co KG | A–5202 Neumarkt am Wallersee | 38 |
| |
isofloc AG | CH–9606 Bütschwil | 1 |
| |
ISOLENA Naturfaservliese GmbH | A–4730 Waizenkirchen | 3 |
| |
Isolith Leichtbauplatten Werk | A–5204 Straßwalchen | 9 |
 |
isospan | A–5591 Ramingstein | 24 |
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