n.回火 backbonemixing: n.返混,逆向混合,反向混合 backbonefill consolidation: n.回填土壓實 backboneplan: n.底視圖 backboneend characteristics: n.餾分組成尾部特征 backbonepressure valve: n.止回閥,逆止閥 下載手機詞典可隨時隨地查詞查翻譯