ऊर्जा एवं ऊर्जा संरक्षण क्या है? Chapter1 Basics of Energy

ऊर्जा क्या है? ऊर्जा संरक्षण क्या है? ऊर्जा के आधारभूत कॉन्सेट ।
कृपया चैनल को सब्सक्राइब अवश्य करें ।
#polytechniclibrelearning #energy #energyconservation #bteup #gpbargarh

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