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বরফ পানি পরিবর্তন কি ধরনের প্রক্রিয়া?

Md. Saifur Rahman

বরফ পানি পরিবর্তন কি ধরনের প্রক্রিয়া?

বরফ পানি পরিবর্তন একটি প্রত্যাবর্তী প্রক্রিয়া।

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বরফ পানি পরিবর্তন কি ধরনের প্রক্রিয়া?

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