Dear friends, both young and old, have you ever wondered how mechanical devices transmit power? Now, just come to our "Wall of Amazing Gears" and you can unravel this mystery yourself! This wall is covered with gears and linkages of various sizes, all meshing together. Your task is simple: choose any gear as your starting point, gently turn the handle, and witness the miracle—power is transferred between the gears like a relay race, and the entire system begins to operate! You can clearly observe the path of power transmission, feel the changes in speed, and even try to change the direction of transmission. Watching these gears work together precisely and in an orderly manner is like watching a wonderful mechanical ballet. Even more interestingly, you can freely combine gears and record the changes in speed ratios under different combinations. You will discover that mechanical transmission is both logical and fascinating. This hands-on understanding is far more profound and interesti
