One X-ray laser already exists in an underground facility at the Stanford Linear Accelerator Laboratory, where it spans several football fields in length.
在斯坦福线性加速器实验室的一个地下设施里已经有了一个X射线激光器，它的频率频距将具有跨越数个足球场的长度。
There are significant difference in tracheids' length and width and height of wood ray comparing with healthy tissues.
与健康组织相比。其管胞的长、宽和木射线高度均差异显著。
The accuracy of this stereoscopic foreign-body locator depends much on the precise calculation of the x-ray film. Patient's eyeball with variation of axial length should be…
本立体定位器所依赖的平面测量数据必须精确，眼球轴长变化应进行折算。
It includes mass absorption of element itself, between elements and element at original X-ray wave length.
它包括元素本身、元素间和元素对某波长的质量吸收。
Methods the length of whole low extremities and total spine were measured in order to confirm the size of the special X-ray film and to design special support photographic equipments.
方法测量全下肢和全脊柱的长度，确定特殊X线照片的规格，并定制相应的摄影器械。
Starting from the ray path equation, object-image relationships are found and used to determine the equivalent focal length and the principal planes of tapered GRIN fiber.
本文从光线轨迹方程出发，推导了锥形梯度折射率纤维的物像关系式，并得出了它的等效焦距和主平面位置。
The experiment group for 102 cases with 180 roots, applying root length surveyor test its working length, undertake root preparing and filling up, took X ray after operation;
实验组102颗牙180个根管，用根管长度测量仪测量其工作长度，进行根管预备和充填，术后拍片；
The experiment group for 102 cases with 180 roots, applying root length surveyor test its working length, undertake root preparing and filling up, took X ray after operation;
实验组102颗牙180个根管，用根管长度测量仪测量其工作长度，进行根管预备和充填，术后拍片；
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