Lovibond- Tintometer groupWater testing – Germany
Lovibond- Tintometer group Colour measurement – UK
Fungilab – Barcelona
SMI-LabHut – UK
Optical Activity Ltd – UK
Index Instruments Limited – UK
Hirscmann – Germany
Tecnología Difusión Ibérica (TDI) – Spain
Kern- Sohn – Germany
Τfa-dostmann – Germany
Microtrac – U.S.A.
Kyoto- Kem – Japan
Kinematica – Switzerland
Consort – Belgium


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