ball-and-socket head是什么意思，ball-and-socket head的翻译，ball-and-socket head音标、读音、用法和例句

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ball-and-socket head是什么意思，ball-and-socket head的翻译，ball-and-socket head音标、读音、用法和例句_淳朴汉英词典

ball-and-socket head

基本解释

专业释义

機械工程