4. E - Fixed Constructions
  5. 21
  6. B

A. Knox John

E - Fixed Constructions – 21 – B

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Composition and method for removing copper containing iron...

C - Chemistry – Metallurgy – 23 – G
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Method of plugging mine passages having water emanating...

E - Fixed Constructions – 21 – F
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Method of retarding reaction of acid on limestone

E - Fixed Constructions – 21 – B
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Well acidizing method

E - Fixed Constructions – 21 – B
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