| 1 | When the inner road is under construction, warnings, fences and the red pilot lights at night must be set up. | |
| 2 | Beacons or Cressets - One who is watchful for the commonwealth or who gave the signal in time of danger. | |
| 3 | Beacons or Cressets - One who is watchful for the commonwealth or who gave the signal in time of danger. | |
| 4 | The light source uses low power LED. It is widely applied to hidden reef of lane and inland river lanterns. | |
| 5 | The power input connector on the switch has two dedicated alarm circuit connections that can be wired to any warning device, such as a PLC or pilot light . |
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