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method framstaellning foer of stroemningsuppdelande bodies foer hot gases bestaaende of a body of the alpha - corundum, as well as the daerigenom framstaellda stroemningsuppdelande body
method framstaellning foer of stroemningsuppdelande bodies foer hot gases bestaaende of a body of the alpha - corundum, as well as the daerigenom framstaellda stroemningsuppdelande body