单词：filament winding method
[网络] 长丝缠绕法；纤维缠绕法
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Is it simply the byproduct of a crude mechanical action? 它仅仅是一个粗糙机械制作的副产品？ Or is it an imitation of one half the set of sounds we make to express disappointment? 或者对我们抒发不满的一种声音的一半所进
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It was the summer of 1878. Tom had been working hard for a long time. He was thinking about taking a vacation. Then a friend invited him to join a group of scientists. They were traveling by train to Wyoming to see an eclipse of the sun. Tom decided
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Science and technology 科学技术 3D printing 三维压制 A third-world dimension 第三世界的发展空间 A new manufacturing technique could help poor countries as well as rich ones 一项新的制造技术能够对贫困国家有所帮助，就
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