건물을 위해 새로운 물질을 시험하는 것은 아주 어려운 일이지만 종이관은 제가 예상했던 것 보다 훨씬 강했고, 방수 처리도 쉬울뿐 아니라, 산업용 재료이기에 내화성도 있습니다.
It's very complicated to test the new material for the building, but this is much stronger than I expected, and also it's very easy to waterproof, and also, because it's industrial material, it's also possible to fireproof.