Conclusions: MPCNL is a therapeutic modality with advantages of high achievement ratio and slight injury especially for upper ureteric calculus with narrow ureter and ureter twist.
结论：MPCNL治疗输尿管上段结石，取石成功率高，创伤小，尤其在输尿管上段结石并发狭窄、扭曲时有良好的疗效。
With twist-against-twist composite yarn, the correlation between breaking strength, breaking elongation ratio and twist of single yarn, twist of composite yarn are analyzed.
在复合纱线反向加捻的情况下，通过试验分析了复合纱线断裂强力、断裂伸长率与单纱捻度、复合纱线捻度之间的关系。
In the spinning process equalization point of the yarn is influenced by twist, spinning tension, roving interval, and overfeed ratio. Certain relationship exists among them.
纺纱过程的平衡点受成纱捻度、纺纱张力、须条隔距及超喂率的影响，它们之间存在一定的关系。
This article describes the spinning technology of mix's color silk-like stretch yarn with focus on the optimization of material choice, mixing ratio, mixing way and twist etc.
论述了配色仿蚕丝氨纶弹力纱的纺纱工艺，重点对原料组分、混比、混合方式、 捻度等进行了优选。
The influence of percentage of spandex, drafting ratio of spandex and twist of core spun yarn on tensile properties and elasticity of spandex core spun yarns on woolen spinning system were studied.
文章介绍了在纺制毛粗纺氨纶包芯纱时，氨纶百分含量、预牵伸倍数和捻度对包芯纱强伸性和弹性的影响规律；
The effects of rotor speed, draft ratio and twist factor on the properties of elastic rotor-spun yarns were investigated, and the technology optimizing was done through the orthogonal test.
分析了转杯速度、牵伸倍数、捻系数对弹性转杯纱性能的影响，并通过正交试验对工艺参数进行了优化。
Abstract : Catamarans feature low resistance, fast speed, good maneuverability, and a large deck area. However, due to their small length to breadth ratio, catamarans can twist in oblique waves.
摘要 ：双体船具有低阻力、高航速、良好操纵性和甲板宽大等优点，但是由于长宽比较小，双体船在斜浪中的扭摇运动比较剧烈。
With twist-against-twist composite yarn, the correlation between breaking strength, breaking elongation ratio and twist of single yarn, twist...
在复合纱线反向加捻的情况下，通过试验分析了复合纱线断裂强力、断裂伸长率与单纱捻度、复合纱线捻度之间的关系。
With twist-against-twist composite yarn, the correlation between breaking strength, breaking elongation ratio and twist of single yarn, twist of composite yarn are an...
在复合纱线反向加捻的情况下，通过试验分析了复合纱线断裂强力、断裂伸长率与单纱捻度、复合纱线捻度之间的关系。
With twist-against-twist composite yarn, the correlation between breaking strength, breaking elongation ratio and twist of single yarn, twist of composite yarn are an...
在复合纱线反向加捻的情况下，通过试验分析了复合纱线断裂强力、断裂伸长率与单纱捻度、复合纱线捻度之间的关系。
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