Refrigeration and air conditioning | Definition Classification Useful

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What are refrigeration and air conditioning, definition, classification and how these are both used and how all these information are sufficient in this blog. In today’s era, refrigeration and air conditioning have become very useful. रेफ्रीजरेसन और एयर कन्डिशनिंग क्या हैं, परिभाषा, वर्गीकरण और रेफ्रीजरेसन और एयर कन्डिशनिंग का इन्स्तेमाल कहा और केसे किया जाता … Read more

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