(Bojnord, North Khorasan, Iran)
We are digging a V shaped hole under an elevator. therefore, if a elevator fall, the force of the fall will not go directly into the ground. The force of fall will transfer to the ground slowly.
This system protects passengers of the elevators from impact. When an elevator is falling, a flat spring (rectangular spring) will be placed in bottom of the elevator.
This system shows resistance against crushing. Therefore with falling of the elevator into the hole, people of the elevator feel the force of the impact slowly.
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