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DRV8825 A4988 42 Stepper Motor Driver Expansion Board for 3D Printer$0.47 -
5.5x2.1mm DC Female Jack Plug Connectors Power Extension Cable$0.20 -
256/440/512Hz Resonance Tuning Fork Experimental Kit$1.84 -
GT2 Timing Pulley 40 Teeth Wheel Aluminum Gear$0.82 -
5V to 3V IIC 2 Channal Level Converter Module$0.16
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.16修改(3).png)
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