विंडमिल, वायु ऊर्जा, पवन चक्की, नवीकरणीय ऊर्जा, रोटार, ईंधन और बिजली उत्पादन, जनक, पवन ऊर्जा, प्रोपेलर, बिजली की आपूर्ति, वातावरण मुफ्त डाउनलोड
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