Pay in 4 interest-free payments of $14.97 Learn more
Ships within 48 hours · Estimated delivery Aug 31 - Sep 5
walking beam pump
Packaging size 190MM long
Product size: 46*25*20cm/18*10*8inch
sucker rod pump
Precision casting and ingenuity
NIKOLATOY® Galton board normal distribution model Size:Big walking beam pumpDescription INTRODUCTION TO GALTON BOARD Place a small round glass ball with a diameter slightly smaller than the distance between two nails at the entrance. As the ball descends, it rolls down to the left or right with a probability of 1 2 after hitting the nails, and then touches the next layer of nails. Continue like this until you roll into a grid on the bottom plate. Continuously dropping numerous small balls of the same size from the entrance,
