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roughness factor
bridg.constr. 粗糙系数
desert. 粗糙度因素
met. 粗糙度
oil 糙率
tech. 相对粗糙度; 糙率因数; 糙率系数
wind. 粗糙因数; 粗糙因素; 粗糙度系数
roughness factor: 8 phrases in 4 subjects
Hydroelectric power stations2
Metallurgy2
Soil science1
Technology3