Expansion Apparatus

Expansion Apparatus Expansion Apparatus Science Labs Hoverlabs is Manufacturer, Exporter Supplier of Expansion Apparatus Product description: Comprising two cast-iron uprights, height 18 cm. linked by two nickel plated rods supporting on expansion bar, length 38 cm. fixed to one upright and resting on a friction pointer placed at the other. With scale reading 0 to 90 deg. With one each aluminum, brass and iron expansion bars..