更换避雷线方法，传统上均需要用张力机牵引旧避雷线后以旧换新。牵引过程中锈蚀的避雷线由于张力作用，存在着断落危险，另外，输电线路下方经常有公路、铁路、低压线路等交叉跨越。为防止更换过...

Automatic sealing machineAbstractIn the past half century,the development speed of science and technology is amazing,including the packaging machinery industry of this design.It is...

[1]郭学锋.细晶镁合金制备方法及组织与性能[.北京：冶金工业出版社，2010.[2]丁文江.镁合金科学与技术[.北京：科学出版社，2007[3]毛萍莉，王锋，刘正.镁合金热力学及相图[.北京：机械工业出版...

社区运动老年人运动生理指标检测软件的设计与实现Design and Implementation of Physiological Index DetectionSoftware for Exercise ElderlyAbsrtact:In modern society,people's living stan...

6.4.8作当量弯矩图（弯矩、扭矩合成图）l36.5校核轴的强度137钉齿条的设计147.1钉齿条的总体结构设计.147.2钉齿条及钉齿的设计.。.147.3钉齿的设计…157.4圆盘的设计…158栅格式凹板的设计169入...

北京邮电大学硕士学位论文AbstractOptical fibre communications have been expected to be a high-speed andhigh-capacity communication,which has a lot of advantages such as low loss,hig...

六辄化流断路器：断口电压高、开断能力相对较强与允许连续开瑞次数偏多，同时其噪音也相对较低，不存在火花危险，另外其尺寸通常较小，重量也相对较轻，维修相对较为容易。该断路器凭借上述优势...

哈尔滨理工大学工学硕士学位论文Research of the Pressure Capillary RheometerAbstractSince the 1960's,with appearance of new polymer materials continuously,polymer materials are more ...

不锈钢饭盒盒盖复合模设计摘要冲压模具广泛用于实际的工业生产中。工人们劳动强度的大小以及工作量多少对于生产效率有这非常大的影响。如今，随着科学技术的发展，模具在已经得到了越来越多的重...

Design and Development of Overhead Layer Intelligent BicycleStereo Parking Equipment-Human-Computer Interactive Designand DevelopmentAbstractDuring the development and progress of ...