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遵照伟大领袖毛主席关于“外为中用”的教导,我们摘译了本文,批判地介绍国外恒弹性材料发展概况,供有关方面参考。
Following the teachings of Chairman Mao, the great leader of “Great Britain and the Middle East,” we have translated this article and critically introduced the development of foreign permanent elastic materials for reference by relevant parties.