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| Consist of a wooden box 175 x 75 x 75 mm with sliding glass
doors, slotted top which carries a glass tube fitted with a
simple torsion head to support a stirrup to carry magnet,
base marked with longitudinal index line. Tube length 150
mm, stirrup 50 x 45 mm length x height. Complete with one
each 50 and 100 mm bar magnets, one each 50 and 100 mm
brass bars. |
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