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2.13 CRT 结构示意图
2026-04-26
网络整理
佚名
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Key Point:图 2.13 CRT 结构示意图（1）电子枪：由灯丝、阴极和控制栅组成。阴极由灯丝加热发出电子束；控制栅加上负电压后，能够控制带负电的电子束的强弱
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