FireDOC Search

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• Farquhar, R. L.; Ball, D. N.
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  New Systems Make for Safer Aircraft.
  Graviner Limited, England
  Fire International, No. 111, 32,34-35, June/July 1988

• Ball, D. N.; Spring, D. J.; Davies, S. J.
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  Fire Extinguishing Substance.
  Kidde-Graviner Ltd., Derby, England
  UK Patent GB 2,233,226A, June 21, 1990, 13 p.