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অণুব্যাপন কি?

Md. Saifur Rahman

কোন সূক্ষ্ম ছিদ্র পথে উচ্চ চাপে গ্যাসীয় অণুসমূহের বের হয়ে আসার প্রক্রিয়াকে অণুব্যাপন বলে।

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