Micron Gold Recovery Device

2019126a mesh to micron conversion table can be made using this screen scale as its base with an opening of 029 inhich is the opening in 200 mesh 021 inire, the standard sieve as adopted by the bureau of standards of the uovtthe openings increasing in the ratio of the sqoot of 2 or 14 except in the sizes nos5 to 200 which increase in the ratio of the 4th root of 2 or 19.

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