射击的特征是形成不同的球体，四个外部互换照射仪头盔配有直径为4,8,14,18毫米的射线孔，以照射不同体积的病灶。
Shots can be represented as different spheres. Four interchangeable outer collimator helmets with beam channel diameters of 4, 8, 14, and 18 mm are available for irradiating different size volumes.
CRT显示屏的阴极射线管，要么把包着管子的塑料外壳扒掉，其实挺简单的，要么直接从显示器外壳上的通风孔盖板走。
A cathode ray tube, CRT, you either remove the plastic housing around the tube, this is easy enough, or you work through the vent panels in the top of the housing.
次生木质部由孔纹导管、 薄壁组织及射线所组成。
Secondary xylem consists of pitted vessels, parenchyma fibers and rays.
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