In this paper 51 cases of selective angiography of the spinal cord are reported.

本文综合了51例选择性脊髓血管造影的结果。

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Accessories: a remote control, a power cord, a user manual, a lens paper, a product certification, a signal line, a back-up insurance control.

配件：遥控器一个、电源线一条、用户手册一本、镜头纸一本、产品合格证一张、信号线一条、备用保险管一只。

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In this paper the method, effect and experience with the application of powder metallurgy ring to low speed twister of cord is introduced.

本文介绍了粉末冶金钢领在低速帘子线捻线机上应用的方法、效果和体会。

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