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Bell in Bell Jar with Plate & Vacuum Pump Plate

Model HV-0032
Standard Bells for Bell Jar with Plate & Vacuum Pump Plate are supplied for educational & industrial applications. The whole apparatus is used to explain that sound needs presence of material medium to propagate. The Electric Bell operates at 4-6 volts AC/DC, held to a rubber cord in bell jar with coiled wire connections to terminals which are attached to a rubber bung, sealing the jar.

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