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In page Pachinko:

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The player loads one or more balls into the machine, then presses and releases a spring-loaded handle, which is attached to a padded hammer inside the machine, launching the ball(s) into a metal track. The track guides the ball over the top of the playing field; then when it loses momentum, it falls into the playing field. Some pachinko machines have a bumper to bounce the ball as it reaches the top, while others allow it to travel all the way around the field, to fall the second time it reaches the top.[citation needed]