%EB%B3%B4%EC%9D%B4%EA%B7%B8%EB%9E%9C%EB%8D%94%2017.5mm%20%26%20%ED%8C%8C%EB%82%98%EC%86%8C%EB%8B%89%20GH1%20%EB%8F%99%EC%98%81%EC%83%81%20%EC%B4%AC%EC%98%81