| Camille Bauer | |
|---|---|
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Camille Bauer Wohlen, Switzerland www.camillebauer.com |
| Gossen Metrawatt | |
 |
Gossen Metrawatt GmbH Nürnberg Germany www.gossenmetrawatt.com |
| GMC Instruments | |
 |
GMC Instruments Nürnberg Germany www.gmc-instruments.com |