| Tapping Key | Type | Remark | |
| a)Â Â Â Â Â Â | Single Contact | Brass Strips (Nickel plated) | insulated knob and terminals mounted on a bakelite plate of high insulation |
| b)Â Â Â Â Â Â | Double Contact | Two Brass Strips (Nickel plated) | four terminals mounted on a bakelite plate on high insulation. |
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Raleigh’s Key
D.P.D.T Switch
