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A new cast steel materials with spheroidal graphite has been studied.
文中研究的是球状石墨铸钢新材料。
youdao
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One design method for winder of spheroidal tank was presented in this article.
介绍一种球罐盘梯的设计方法。
youdao
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One design method for winder of spheroidal tank was presented in this article.
介绍一种球罐盘梯的设计方法。
youdao