Scanning in a first direction is longitudinally through an aperture (55) in a vacuum chamber wall.
在第一方向上的扫描是纵向穿过在真空室壁上开口（55）。
2
A large aperture laser beam scanning method by combining microlens arrays with rotating mirror is put forward.
提出微透镜阵列与转镜相结合的大口径激光光束扫描方法。
3
Objective: To study the scanning electron microscopic (SEM) characteristics of floor between lateral recess and lateral aperture of the fourth ventricle in the mice with vascular dementia (VD).