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Top: Science: Chemistry: Analytical: Separations_Science: Gas_Chromatography: Products_and_Services: Instruments

Sites primarily for gas chromatographs, although manufacturers who specialize in one component of GC systems are included here.
For instrument components, tools and accessories see the parent or Supplies categories.

• Open Directory Business: Industrial Goods and Services: Industrial Supply: Safety Equipment Supplies: Gas Detection
• Open Directory Science: Chemistry: Analytical: Separations Science: Products and Services: Instruments

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