혹시 concept sale is idea(으)로 찾으셨나요?

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• 과학적 혁신은 협력의 산물이다 watt, is named, is said to have hatched the idea for the steam engine from a sudden inspiration he had that had already been in use for some fifty years by the time he got his hands on it. blog.naver.com · 2026.06.29