Pretty subjective question without more definition. Hydraulic or electric work well but are expensive. Manual can do the job it some circumstances.
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There is a manufacturer nearby in San Antonio called SlowStop bollards.
If someone wanted to purchase plastic bollards there are a variety of places where someone can purchase one. Some of these places are Seton, Slingsby, Bollards Direct, Amazon and Barriers Direct.
bollard
No, a cat does not have retractable paws it has retractable claws
Japan has a better technology.
No, a squirrels claws are not retractable.
This car has a retractable antenna.
No, it does not have a retractable roof.
Many places. A mooring bollard would be found in a harbor on a ship dock. Parking bollards are found in parking lots protecting buildings and utilities. Traffic bollards are found on islands and protecting pedestrians. Safety bollards are found throughout industrial plants and warehouses protecting loading dock doors and wall, equipment, pallet rack, and employees.
Yes. The roof is retractable.
The country that has better technology than the US is Japan.