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We aimed at the release and dynamic management of CAD network graphics library (NGL). The characteristics of realization on network of CAD graphics are analysed, while the existing problems of the presenting share methods of graphics file are also discussed. Release and dynamic management are accomplished with the B/S combined with C/S as well as the file organization based on attribute information, which have essential practical sense to the establishment of CAD NGL, share and cooperation in tech-design as well as the distance education of engineering graphics. 相似文献
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滚动轴承是地下运输机械最薄弱的环节,经常发生疲劳、胶合、点蚀等故障,进而造成齿轮打齿、轴弯曲等一系列机械零件的损坏,最终导致整个齿轮箱失效,严重影响生产。因此,对地下运输设备的滚动轴承进行工况监测具有十分重要的意义。振动测试在地下矿山并未得到广泛的应用,主要原因有两个:一是缺少本安、防爆型的振动检测仪器;二是在井下潮湿、强干扰环境下, 相似文献
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