Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 須藤 浩三 and 檜原 秀樹 and 角田 勝 and 枚原 健展,Resistance Formula for Rough Curved Square Pipes with Strong Curvature.,Turbomachinery,03858839,Turbomachinery Society of Japan,1998,26,4,193-199,https://cir.nii.ac.jp/crid/1390282679521254656,https://doi.org/10.11458/tsj1973.26.193