以下为句子列表：
英文: In order to ensure the material quality and welding quality of expansion joint of spiral case, and the safety and reliability of hoisting equipment, the practical, scientific and reasonable installation technique is key and essential.
中文: 摘要为了保证蜗壳凑合节瓦片的下料质量、吊装设备安全可靠和焊接质量，切实可行和科学合理的安装工艺将是极其关键的一项工作内容。
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英文: The calculation of stagnation point position of straight pipeline section with both movable ends and L-type pipeline section with bend at one end and bellows type expansion joint at other end is discussed.
中文: 摘要探讨了两侧为活动端的直管段及一侧活动端为弯头，而另一侧活动端为波纹管补偿器的水平转角管段驻点位置的计算。
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英文: The cutting method, installation and welding technique of the expansion joint of spiral case of No. 5 generating unit of Long-tan Hydropower Station have gained good effectiveness, which can be used for reference for the similar generating unit.
中文: 龙滩水电站安装完毕的5号机蜗壳凑合节的下料方法、安装与焊接工艺都取得了良好的效果，对同类机组会有一定的借鉴作用。
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英文: The key factors affecting the stagnation point position of L-type pipeline section are the setting position of bellows type expansion joint and the bend angle degree.
中文: 影响水平转角管段驻点位置的主要因素为波纹管补偿器设置位置、弯头角度。
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英文: The modes selection of directly buried installation for hot-water heat-supply pipeline, the design and construction of directly buried installation with and without expansion joint and the quality assurance of prefabricated directly buried insulating pipe
中文: 摘要结合工程实例，探讨了热水供热管道直埋敷设方式的选择，有补偿和无补偿直埋敷设方式的设计与施工及预制直埋保温管质量的保证。
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