短語(yǔ)詞組短語(yǔ)roughness coefficient index 糙度系數(shù)指標(biāo)IRIInternational Roughness Index 國(guó)際平整度指數(shù)international roughness index IRI 國(guó)際平整度指數(shù)Internationa Roughness index 國(guó)際糙度指標(biāo)International Roughness Index 國(guó)際平整度指數(shù);度指數(shù)damage and roughness index 破損與平整load roughness index 荷載粗糙度指標(biāo)road roughness index 路面不平度指數(shù) 返回 roughness index