以下为句子列表：
英文: Technologies such as chemical constitution selecting, alloy melting, casting process designing and optimizing, mechanical machining and heat treatment process on pump body, impeller, front and rear board of CW.NB450 dredge pump abrasion resistance parts a
中文: 摘要总结了用于挖泥船的CW.NB450型泥泵过流耐磨部件泵壳、叶轮、前后衬板的化学成分选择、合金熔炼、铸造工艺设计及优化、机械加工、热处理工艺等技术。
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英文: STUDY ON THE CHEMOTAXONOMY OF ARTEMISIA L. (COMPOSITAE) IN CHINA--The Correlation of Chemical Constitution of the Essential Oil wish the Plant Classification
中文: 中国蒿属植物化学分类的初步研究——精油化学成分与系统分类的相关性
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