ปากกาหมึกนำไฟฟ้า ความนำไฟฟ้าสูง สำหรับการทดลองทางฟิสิกส์ โครงการวงจร DIY สีบรอนซ์ สีเงิน ให้เลือกได้

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Metal detector, with five detection modes, a backlit LCD display screen, an advanced DSP chip, and comes with a bag and a stand

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