patents (class ) furnaces patents (class ) with control means responsive to a sensed condition (class / ) feed control (class / ) with programmed or cyclic control means (class / ) timer (class / ) with safety means (class / ) crematory (class / ) forge (class / ) straw burner and feeder (class / )...
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(b) purification of bauxite to aluminium oxide the principal impurities in bauxite are iron(lll) oxide ( - %), silica ( - %) and titanium dioxide ( - %). powdered bauxite is mixed with approximately % sodium hydroxide solution and the resulting mixture heated under pressure ( atm) at about k. under these...
against fatigue ease in manufacturing complex shapes simple repair of damaged structures resistance to corrosion there are many different types of composites. this unit looks at two which are of major importance and which are currently being developed for many uses: fibre reinforced polymer composites...
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