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Speakers ज्यादातर काले (Black) क्यों होते है? Why Speakers Are Mostly Black in Colour? TEF Ep 138

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FactTechz

Why speakers are mostly black in colour? Have you seen a calorie calculator stairs? Which is the largest butterfly species in the world?

Let’s explore various amazing random facts like this in episode 138 of TEF (Top Enigmatic Facts).

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