Rotate the switch to the blade teeth hit adhere to each of the tested number of blades 3 blade each time the speed to hit the glass bottle with different speed.
Rotate the blade teeth hit the switch that attaches to the experiment, each blade of the knife 3 times, each time using speed to hit the glass with different speeds.
Rotate the correct secret tooth blade attached to each blade, blade machine experiment of each 3 times. Each time the speed to hit the glass bottles with speed around the different.