Numerical NAICS Code List 2017 Class Codes
This page contains a numerical NAICS code list 2017. Users can view and lookup an index of 2017 NAICS codes in numerical order.
26 U.S. Code § 613 Percentage depletion US Law LII ...
in the case of lead, zinc, copper, gold, silver, uranium, or fluorspar ores, potash, and ores or minerals which are not customarily sold in the form of the crude mineral productcrushing, grinding, and beneficiation by concentration (gravity, flotation, amalgamation, electrostatic, or magnetic), cyanidation, leaching, crystallization ...
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