国产精品国产三级国产专区50-侵犯美人妻中出中文字幕-丰满的少妇XXXXX青青青-99爱在线精品视频免费观看

High Energy Ray Shielding

Nuclear radiation has been widely used in the field of nuclear technology, for example: material thickness measurement or defect detection, nuclear medicine, radiation breeding, radiation imaging, etc., the list goes on. There are many kinds of radiation sources in the application of nuclear technology, including a single type of radiation source that emits a particle, b ray, g ray or neutron, and a combination of these types of radiation sources. Therefore, shielding design needs to be targeted according to the type and intensity of the radiation source.