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Frank Kauffmann, General Manager of Philips Special Lighting, and Rob van Rooij, Global Product Market Manager of Philips Medical and Special Lighting, delivered their congratulations for the 20th anniversary of Sigma.

Sigma has a large number of patents and has been regarded as a "Shanghai Hi-tech Enterprise" since 2001. Our independent research and development for the SS-03 and SS-05 ultraviolet phototherapy units won us the “Shanghai A-level High-Tech Achievements Transformation Project" in 2002.
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