李德翠

这个人很懒,什么都没写

76篇文档量6386次浏览5416次下载
共有文档21 打包下载
  • 分类:经济 格式:PDF 积分:0 上传者:李德翠 上传时间:2018-01-25

    摘要:A solar energy collection panel is described for collecting solar energy to heat water. The panel is a simpl...

  • 分类:经济 格式:PDF 积分:0 上传者:李德翠 上传时间:2018-01-25

    摘要:A method and apparatus are disclosed for producing a composite pipe for handling destructive materials under...

  • 分类:经济 格式:PDF 积分:0 上传者:李德翠 上传时间:2018-01-25

    摘要:A sun tracking apparatus comprises a first pair of photosensors arranged at symmetrically opposed positions ...

  • 分类:经济 格式:PDF 积分:0 上传者:李德翠 上传时间:2018-01-25

    摘要:The ball bearing comprises a pressed metal cup in which are loosely-mounted axially-spaced, pressed metal th...

  • 分类:经济 格式:PDF 积分:0 上传者:李德翠 上传时间:2018-01-25

    摘要:A packing assembly provides a seal for an annular space between a pump plunger and a pump body of a reciproc...

  • 分类:经济 格式:PDF 积分:0 上传者:李德翠 上传时间:2018-01-25

    摘要:A supplying port connecting to a supplying-side hydraulic pressure is arranged in a lock-up control valve. W...

  • 分类:经济 格式:PDF 积分:0 上传者:李德翠 上传时间:2018-01-25

    摘要:A poly(vinylamine) which is preferably a poly(vinylamine) hydrochloride is an effective drag reducing agent ...

  • 分类:经济 格式:PDF 积分:0 上传者:李德翠 上传时间:2018-01-25

    摘要:Gun sights have a general cross-sectionally semi-circular support member provided with a lengthwise extendin...

上一页 1 2 3 下一页 跳转