Do You know- നിങ്ങൾക്ക് അറിയാമോ?
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After testing thousands of materials including cotton thread, linen, wood splints, and even human hair — Edison found that Carbonized bamboo as the best filament that could last more than 1,200 hours without burning.
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#പുതിയ അറിവുകൾ 😍😍 #എഡിസൺ👏👍


