Okay, the user wants me to translate "postal history" into Korean. Let me check the rules again. The first rule says to translate all content into Korean. The second rule states that if the content is already in Korean, leave it as is. The third rule is to provide only the translation without any explanations.
So, "postal history" in English needs to be translated. The direct translation would be "우편 역사" in Korean. I should make sure there's no existing Korean content here. Since the user provided the English term, I need to convert it. No explanations, just the translation. Let me confirm that "우편 역사" is the correct term. Yes, that's the standard translation. Alright, that's all.
우편 역사
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