以下为句子列表：
英文: 414 We usually use elbow (bend, flange, tee, reducer ) as a kind of pipe fitting.
中文: 我们常用弯头（弯管、法兰、三通、大小关）作为一种管件。
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英文: Abstract: In this article,the optimization of surface crack detection of speed reducer gear was made using fuzzy set theory,the result show that the rotation magnetic field is the best way of surface crack detection and lots of extending surface fatigue c
中文: 文摘:采用模糊集的贴近度计算对齿轮表面探伤方法进行了优化选择，表明旋转磁场探伤是齿轮表面探伤的最佳方法，在实用中检测出大量的正在延伸扩展的表面疲劳裂纹。
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英文: Abstract: Tensile reducer is one of the necessary apparatuses during the pipe production process at present.This paper deduces a multi-variation formula by using the energy principle and adopting upper limit method.The formula can be used to calculate the
中文: 文摘:张减机是钢管生产中不可缺少的设备之一.本文从一般能量原理出发，采用上限法推导出一个多变量公式，利用该公式可求解电机功率、张力系数、轧辊转速、出口钢管壁厚、孔型椭圆度等参数，并且从理论上计算出电机负功率的存在.
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英文: All-in-one and compact design. Motor, gear reducer and all the necessary functions for excavator and mini-excavator are integrated.
中文: 挖掘机、小型挖掘机采用了将减速机和各种功能（阀、制动器等）合为一体化的紧凑设计。
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英文: Automatic Grinder for Bell coup cutters for Shaping lathes type BACCI Motor 0.75 Kw .With motoreducer with neumatic turbine at 18.000 RPM Micrometric deep control sharp.Net Weight 25 Kg.
中文: 自动化经杯型刀具专业加工磨刀机.减速马达功率为0.75千瓦.微调控制磨具转速可高达18000RPM.净重25公斤.
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