以下为句子列表：
英文: 12B twister adopt dual support , the main axis adopt thick seamless steel tube, through the keyway connect the winch and have good rigidity and no riding wheel(1 set of 12B assistant riding wheel ), adopt gear to back twist and the twister can rotating on
中文: 12盘绞体采用双支撑座支撑，主轴为厚无缝钢管、通过键槽连接绞盘、具有钢性好、无托轮（12盘辅助托轮1套），采用齿轮退扭、绞体可长期高速旋转。
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英文: Abstract Cutter teeth and gear teeth are simplified as mechanical models, The bending deformation at contact nodes is calculated by applying the three-dimension finite element method and analyzing their mechanical condition, the relation curve between sha
中文: 简介：摘要将刀齿和轮齿抽象简化为力学模型，分析其受力状态，并运用三维有限单元法计算各节点的弯曲变形量。
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英文: Abstract: A large planar microphone array,which consists of 111 microphones,was successfully applied to obtain a two-dimensional mapping of the sound sources on a landing aircraft.The focus of study in this paper is on the landing gear noise source.The sp
中文: 文摘:应用由111个传声器组成的平面传声器阵列对当前流行的民用客机进场着陆过程中的机体噪声源进行了实验测量，本文对七架窄体客机和七架宽体客机的起落架噪声进行了分析，得到了起落架噪声的频谱特性、指向特性和声级变化.研究发现，起落架噪声的频谱是由宽频随机噪声与一些较为明显的单音噪声源组成，起落架噪声的指向性类似于一个水平放置的偶极子.不同飞机起落架噪声的声级相差较大，这说明可以通过重新结构设计降低起落架噪声。
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英文: Abstract: In order to solve the double parameters enveloped in the geartooth flank generating,the complicated double parameter envelope is simplified to the generating process between work-piece and imaginary crown generating gear by means of mathematical
中文: 文摘:为了解决直接求解展成法加工中存在的复杂双参数包络问题时的困难，提出通过数学变换，将此包络问题转化为假想平面产形轮与工件之间的展成问题来进行研究.推导了假想产形面的方程和各阶偏导矢，于是可获得产形面的微分几何参数.通过分析假想平面产形轮与工件之间的展成运动，即可得到被展成齿面上任意指定点的全部一至三阶微分几何参数.
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英文: A Discussion on Generating Helical Gear with Prime Number of More Than 00 Teeth without Differential Chains
中文: 在滚齒机上无差动加工大于00齒以上的质数斜齒轮的探讨
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