4. Metallurgical apparatus
  5. Means for treating ores or for extracting metals
  6. By means precipitating metal from solution

Donny L. Peterson

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Apparatus and method for converting polyethylene terephthalate i

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in tubular or loop reactor
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Silver recovery unit

Metallurgical apparatus – Means for treating ores or for extracting metals – By means precipitating metal from solution
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