nines
n.— «The copper was OFHC grade; the zinc was five nines pure.» —“United States. National Bureau of Standards” Preparation of NBS White Cast Iron Spectrochemical Standards , 1918. (source: Double-Tongued Dictionary)
nines
n.— «The copper was OFHC grade; the zinc was five nines pure.» —“United States. National Bureau of Standards” Preparation of NBS White Cast Iron Spectrochemical Standards , 1918. (source: Double-Tongued Dictionary)
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