Bar And Gauge blood bank refrigerated centrifuge The iron components are also

The iron components are also treated to resist rusting

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Bar And Gauge blood bank refrigerated centrifuge The iron components are alsoBar And Gauge For illustrating expansion by heating and contraction by cooling. Comprising a bar of iron mounted on a support rod with wooden handle, and a brass gauge with a cut out which barely admits the bar lengthways while cold, and a hole which passes the bar endways only while cold. Heating the bar and then comparing it to the gauge provides an excellent visual demonstration of thermal expansion.