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The Scottish Oils andShell-Mex Ltd Ardrossan30" high temperature oilsealed spring loaded <strong>Viking</strong><strong>Johnson</strong> Couplings connectingfractionating and condensercolumns, for temperatures upto 250° and accommodating2 1 /2" vertical movement.In this year...Chester F.Carlson inventedthe photocopier.The first jetengine was built.