With the 737, even though they've upgraded the length, the...
With the 737, even though they've upgraded the length, the avionics, and the wings, the cross-section of the plane remains the same as it was 40 years ago.
With the 737, even though they've upgraded the length, the avionics, and the wings, the cross-section of the plane remains the same as it was 40 years ago.