Okay, the user wants me to translate "inward curve" 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, "inward curve" is in English. I need to translate it. The direct translation would be "내부 곡선" in Korean. Let me confirm that "inward" translates to "내부" and "curve" to "곡선". Yes, that seems correct. I should make sure there's no alternative translation that's more commonly used. Maybe "내향 곡선" could be another option, but "내부 곡선" is more straightforward. Since the user wants only the translation, I'll just provide "내부 곡선" without any extra text.
내부 곡선
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