Springs!

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Across
  1. 3. A vehicle that used coil spring suspension in the early 20th century
  2. 4. ____ spring, can be electronically controlled to change height
  3. 7. The stored energy when a spring is compressed
Down
  1. 1. 18th century vehicles that used spring suspension
  2. 2. The most commonly used spring in modern vehicles
  3. 5. ____ spring, twists to absorb shock
  4. 6. ____ spring, made up of several curved metal plates