4. Chemistry of inorganic compounds
  5. Modifying or removing component of normally gaseous mixture
  6. Mixture is exhaust from internal-combustion engine

Johnson Matthey & Company Limited

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Exhaust gas purification

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
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Platinum group metal-containing alloy

Alloys or metallic compositions – Nickel base – Chromium containing
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