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Electric receptacles designed to establish an electrical connection with an inserted plug and provide a higher level of protection from corrosion, impact, and other electric hazards than regular receptacles. These electric receptacles commonly have slots or holes, or a combination of the two into which devices are plugged; the slots or holes have metal contacts that are connected to electrical wiring. The receptacles are very heavily insulated and coated in heavy duty plastic to protect them from damage.
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