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1. ½Ã°ø¹æ¹ý ¹× À¯ÀÇ»çÇ×Àº Ä«´Ù·Î±× p47¿¡ ¼ö·ÏµÇ¾î ÀÖ½À´Ï´Ù. 2. À̰ݰŸ®´Â ÃÖ¼Ò 100cmÀ» À¯ÁöÇÏ¸é ¿¬°á, ´ÙÁü¿¡ ÁöÀåÀ» ÁÖÁö ¾Ê´Â ¹üÀ§°¡ µÉ ¼ö ÀÖ½À´Ï´Ù. (Ãâó Handbook of Steel Drainage and Highway Construction Products, MULTIPLE INSTALLATIONS (P328-330) AMERICN IRON AND STEEL INSTITUTE)
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