Objective To explore the angiographic appearances of the hemodynamic change of spinal dural arteriovenous fistulae ( SDAVF ) .目的探讨硬脊膜动静脉 瘘 血液动力学改变的血管造影表现.The dural is the fin tissue covering the inside of the skull.硬脑膜是覆...
Electron - beam lithography with a novel multilevel resist structure defines the pattern.采用新型的多层抗蚀剂结构的电子束光刻来形成图形.Composition rich in imaginative design, lithography wonderful way abnormal.设计构图想象力丰富, 刻制手法异常奇妙.Individual s...