concave bending of frame是什么意思，concave bending of frame的翻译，concave bending of frame音标、读音、用法和例句

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concave bending of frame是什么意思，concave bending of frame的翻译，concave bending of frame音标、读音、用法和例句_淳朴汉英词典

concave bending of frame

基本解释

专业释义

交通運輸工程