以下为句子列表：
英文: Analyzed the reason of stress corrosion cracking on U shape brass tube bundle when it is having penetrative test with ammonia, improved technology of test and gave out the method should be paid attention to during the process of brass tube exchanger.
中文: 摘要对黄铜管换热器管束在氨渗试验过程中发生应力腐蚀，导致铜管破裂的原因进行了分析，改进了施工方案，并提出了黄铜管换热器制造过程中对管束进行耐压试验时的注意事项。
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英文: For the two stages brass tube with high aspect ratio, there are many challenges in the front of tool makers.
中文: 本文深引伸模具开发所应用的技术範围为多道次深引伸传送冲模技术。
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英文: In this paper, the author would like to disclose the development in transfer tool for high aspect ratio deep drawing brass tube with two stages at MIRDC.
中文: 摘要本文主要介绍金属工业研究发展中心，以深引伸传送技术开发高长径比双阶差黄铜管件深引伸模具之成果，包含工程规划、模具设计及试模等方面。
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