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Teching 202Pcs Electric Waterwheel Model 3D Metal Assembly Kit DM606 RC Car_Rovan The same material can reduceTeching 202Pcs Electric Waterwheel Model 3D Metal Assembly Kit DM606Features:. The waterwheel model takes you into the real industrial world and restore every step of mechanical manufacturing.. Made of metal in precision casting with CNC technology, aluminum alloy oxidized color, and real machine workmanship at the level of collection crafts.. The mechanical structure is classically presented, and the clear transmission process is clear at a glance.