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Meaning : Used as a lubricant and as a moderator in nuclear reactors.
Synonyms : black lead, plumbago
कार्बन का एक प्रतिरूप जिसे ब्लैक लेड भी कहते हैं।
କାର୍ବନର ଏକ ପ୍ରତିରୂପ ଯାହାକୁ କଳା ସୀସା ମଧ୍ୟ କହନ୍ତି
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