A several days before. I search for information on the Pathfinders Wooden Hydraulic Robotic Arm, so i have to tell.
Build a working hydraulic arm with this excellent 66-piece kit from Pathfinders Simple Machine series. Structure is die-cut plywood and the kit includes tubing three syringes and glue. You'll need a ruler and scissors. The finished arm will be approx 13-1/2" tall and will reach. Read more
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