Plug Key, Three Way
Four brass blocks 9 mm thick with brass terminals mounted on a bakelite base. Accurately tapered plug with bakelite moulded top is fitted into the gap between the brass blocks.
Science Lab Equipment Manufacturer
Four brass blocks 9 mm thick with brass terminals mounted on a bakelite base. Accurately tapered plug with bakelite moulded top is fitted into the gap between the brass blocks.
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