Then came steel strings, and that led to the lap guitar—which is also called the steel guitar because the player slides a steel rod up and down the neck.
Norman Rockwell, a 20th-century artist, never painted Boy Swiping Finger on Screen, and our own vision of a perfect childhood has never been adjusted to accommodate that now-common scene.
What those early craftsmen had found by trial and error was that under pressure a pagoda's loose stack of floors could be made to slither to and fro independent of one another.
The design of Ackerman geometry plays a very important role on vehicle design, reasonable design could reduce the slipping in turning, make the abnormal wear in a permissive range.
Then came steel strings, and that led to the lap guitar—which is also called the steel guitar because the player slides a steel rod up and down the neck.