beam hole

基本解释

He worked in a darkened room and obtained the beam through a hole in the shutter.
他在黑暗屋子里做实验，从百叶窗的一个小孔处得到了光束。
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Bending behaviors of single crystalline nano-copper cantilever beam models with hole are simulated by MD using embedded atom potential.
应用分子动力学方法模拟了带孔纳米单晶铜悬臂梁的弯曲过程。
This paper give two reinforcement methods of the circular hole castellated beam-castellated beam with full-web extremity and castellated beam reinforced by transverse stiffeners.
提出了两种蜂窝梁的补强方法——端部实腹蜂窝梁和孔边设置横向加劲肋。

a hole in the shield of a nuclear reactor through which a beam of radiation, esp of neutrons, is allowed to escape for experimental purposes