Crystal is defined as the heart of modern timekeeping devices. This is the quartz oscillator that controls the accuracy of a timer. High-quality timing devices contain Temperature-Compensated Quartz Crystals (TCXO) that provide highly accurate timing in great temperature extremes.

See also:

"Crystal" is in the HS Code "9013"
  Liquid Crystal Devices Not Constituting Articles Provided For More Specifically In Other Headings; L

"Crystal" is in the UNSPSC Code "12162902"
  Crystal modified paraffin asphaltene control agents

Ref: 123337/2006-10-01

Other Database Pages Exist for this Phrase:
Alum (Alum refers to astringent crystalline double ...)
Graphite (Graphite refers to a crystalline form of carbon, ...)

List of books: Crystal

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