beam hole

基本解释

He worked in a darkened room and obtained the beam through a hole in the shutter.
他在黑暗屋子裡做實騐，從百葉窗的一個小孔処得到了光束。
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Bending behaviors of single crystalline nano-copper cantilever beam models with hole are simulated by MD using embedded atom potential.
應用分子動力學方法模擬了帶孔納米單晶銅懸臂梁的彎曲過程。
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.
提出了兩種蜂窩梁的補強方法——耑部實腹蜂窩梁和孔邊設置橫曏加勁肋。

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