tractional detachment是什么意思 tractional detachment在线中文翻译

tractional detachment是什么意思，tractional detachment在线翻译，tractional detachment中文意思，tractional detachment的中文翻译，tractional detachment发音，tractional detachment例句，tractional detachment词组短语，tractional detachment怎么翻译，单词tractional detachment的意思