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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Cen·ter seal, or Cen·tre seal,. Gas Manuf. A compound hydraulic valve for regulating the passage of the gas through a set of purifiers so as to cut out each one in turn for the renewal of the lime.
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From: Webster's Revised Unabridged Dictionary (1913)

 Center seal, Centre seal. Gas Manuf. A compound hydraulic valve for regulating the passage of the gas through a set of purifiers so as to cut out each one in turn for the renewal of the lime.
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