Plug example sentences

We know that an electric circuit, as shown in Figureure 1 1, comprises a cell (or a battery), a plug key, electrical component(s), and connecting wires.The most alert workers would form a “plug” in the doorway, and the whole mass piled up in the exit.Then we have plugged this solution in the first equation to derive the relationship between x and z.Figureure 1 1 shows the schematic diagram of a typical electric circuit comprising a cell, an electric bulb, an ammeter and a plug key.