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  • Welcome to the 119th Spring Canton Fair 2016 April

    Welcome to the 119th Spring Canton Fair 2016 April

    Date: 2016-3-16

    Welcome to the 119th Spring Canton Fair 2016 April   Canton Fair 2016(The 119th China Import and Export Fair) is the largest biannual China trade fairs ...
  • Crookes radiometer

    Crookes radiometer

    Date: 2015-5-27

    Crookes radiometer From Wikipedia, the free encyclopedia     This article needs additional citations for verification. Please help improve this art ...
  • Hourglass, Sand Timer

    Hourglass, Sand Timer

    Date: 2015-5-16

    Hourglass From Wikipedia, the free encyclopedia     For other uses, see Hourglass (disambiguation).   Hourglass in a three-legged stand An hourglass ( ...
  • Fitzroy Storm Glass

    Fitzroy Storm Glass

    Date: 2015-3-27

    Storm glassFrom Wikipedia, the free encyclopedia   Crystals forming in a storm glass prior to a stormA storm glass is a type of weather forecasting device, composed of a sealed glass co ...
  • Newtons cradle

    Newtons cradle

    Date: 2014-5-6

    Newton's cradle, named after Sir Isaac Newton, is a device that demonstrates conservation of momentum and energy using a series of swinging spheres. When one on the end is lifted and released, it ...
  • What is artificial intelligence (AI)? 什么是人工智能

    What is artificial intelligence (AI)? 什么是人工智能

    Date: 2023-2-25

    What is artificial intelligence?While a number of definitions of artificial intelligence (AI) have surfaced over the last few decades, John McCarthy offers the following definition in this 2004 p ...
  • About Canton Fair

    About Canton Fair

    Date: 2014-3-18

    Canton Fair   Canton Fair Detail of the structure of one of the exhibition halls in Pazhou. Simplified Chinese 中国进出口商品交易会 T ...
  • Optical Filters 光学滤光片

    Optical Filters 光学滤光片

    Date: 2023-2-24

    光学滤光片滤光片选择性地透射光谱的一部分,同时拒绝透射其余部分。爱特蒙特光学的光学滤光片常用于显微镜、光谱学、化学分析和机器视觉,可提供各种过滤类型和精度等级。本应用笔记介绍了用于制造爱特蒙特光学滤光片的不同技术、一些关键规范的定义以及爱特蒙特光学提供的各种滤光片的描述。光学滤光片关键术语虽然滤光片与其他光学组件有许多相同的规范,但是为了有效地了解并确定哪种滤光片最适合您的应用,应该了解滤光片中的 ...
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