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12V 30A T90 Relay 350mm Trapezoidal 4 Start Lead Screw 8mm Thread 2mm Pitch Lead Screw with Copper Nut and playback no external and playback no external flash memory or codec needed 6V 20A 18650 lithium battery protection board (comes with recovery function AUTO Recovery) We source directly from authorized distributors with full authentication verification and traceability expert support
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