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Laboratory Resistance Box Royalty-Free Stock Photo

Title

Laboratory resistance box #33039987

Description

Old laboratory resistance box. Such as would be used in a laboratory experiment or for electrical research and development maybe in a college or company research department. Converts electrical energy to heat energy. Black phenolic resin front panel with white engraved legends and large bakelite knob, can be set 0 to 2.5 kilo ohms (2500) with a maximum current of 0.28 amperes. Isolated on white.