... beam current 射束电流电子束电流 beam deflection type proportional amplifier 射束偏转形比例放大器 beam hole 束孔 ...
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horizontal beam hole 水平射束孔道
beam hole shielding 孔道屏蔽
beam hole shield 射柱孔屏蔽
beam-entry hole 束入射孔
wall beam with hole 开洞墙梁
hole slab beam 大孔板梁
large hole slab beam 大孔板梁
N 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 引束孔道
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