chain on the beam是什么意思，chain on the beam的翻译，chain on the beam音标、读音、用法和例句

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chain on the beam是什么意思，chain on the beam的翻译，chain on the beam音标、读音、用法和例句_菜篮子兴趣思朗文词典

chain on the beam

基本解释

专业释义

地球科學