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2. Swing-door operator - Wikipedia

   en.wikipedia.org/wiki/Swing-door_operator

   Swing side, door mounted sensor—mounted on the swing side of the door itself, used as the door is opening to detect a user in the way of the opening door. In that case, the operator stops the door. The sensitivity of infrared sensors must be reduced at the end of the opening angle, if it starts seeing a wall next to the door, so it may not ...

3. Electric gate - Wikipedia

   en.wikipedia.org/wiki/Electric_gate

   Most gate kits can be fitted with safety equipment so that these limits are achieved and so cover that part of EN13241-1. In September 2010, following two incidents in Bridgend and Manchester , when children were killed by sliding gates, the UK Health and Safety Executive issued 2 safety notices aimed at gate manufacturers and installers ...

4. Rolling code - Wikipedia

   en.wikipedia.org/wiki/Rolling_code

   Remote controls send a digital code word to the receiver. If the receiver determines the codeword is acceptable, then the receiver will actuate the relay, unlock the door, or open the barrier. Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow.

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6. Dump truck - Wikipedia

   en.wikipedia.org/wiki/Dump_truck

   Some bodies, typically for hauling grain, have swing-out doors for entering the box and a metering gate/chute in the center for a more controlled dumping. In the United States most standard dump trucks have one front steering axle and one (4x2 [ a ] 4-wheeler ) or two (6x4 6-wheeler ) rear axles which typically have dual wheels on each side.

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