EA mounted on the either end of rotor shaft can generate impulse excitation force or simple harmonic excitation force with different frequency.

The space elevator is exactly what its name says it is: a long cable anchored at one end to the ground and at the other end high in space, protruding from the planet like a spoke in a rotating orange.

The spine splits and splays from one shore along the central void position, diverging under the road decks to the outside of the roadways at the other end of the bridge.