Results 51 to 60 of about 826 (103)
Hand-sewn expanded polytetrafluoroethylene valved conduit for right ventricular outflow tract reconstruction. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2022 Qian T +6 more
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Gaoya dianqi, 1975 在第一讲中我们已经提到:熄灭电弧是断路器最艰巨的任务之一,和其它开关电器相比,断路器的特殊性突出地表现在它的灭弧装置上,甚至断路器本身的分类最主要也是按灭弧装置的类型来划分的。前面几讲介绍过的导电、绝缘、操动,在一定意义上来说,是为灭弧服务的。断路器的灭弧装置不同,它的导电、绝缘、操动系统的结构及断路器的性能都可能因之而异。所以 ...
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[Therapeutic effects of sacral neuromodulation on detrusor underactivity]. [PDF]
Beijing Da Xue Xue Bao Yi Xue Ban, 2021 Wang Q +7 more
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Dianci bileiqi, 2018 根据绝缘导线雷击断线机理,研制出了一种多通道灭弧防雷装置,该防雷装置通过电弧通道拐点设计、压缩雷电弧、产生电弧百个纵向和横向的截断粉碎点机制,形成雷电弧先通后断性自灭,有效阻断建弧通道,实现建弧抑制。能够有效的避免10 kV绝缘架空导线雷击断线。通过对灭弧装置原理结构分析,以及对电弧平均温度、电流,单元灭弧压缩管道中心自膨胀气流压力、速度,以及电弧平均电流密度、电导率的时变趋势或规律分析,验证了该装置的可靠性。
郑传啸 +4 more
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[Application of three-dimensional printed porous titanium alloy cage and poly-ether-ether-ketone cage in posterior lumbar interbody fusion]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2022 Wang Y, Zhou Y, Chai X, Zhuo H.
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[Research progress in repair and reconstruction of tumor-related bone defects in proximal femur]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiTan L +9 more
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A case of echinococcosis in Hunan Province. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2022 Li J, Deng S, Jiang L.
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[Several issues that need attention to improve the diagnosis and treatment level of infectious wounds]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiLiu Y.
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[Bacteriophage Therapy: Retrospective Review and Future Prospects]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue Ban, 2021 Tian EK, Wang Y, Wu ZX, Wan ZQ, Cheng W.
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