The formulation and technology of nitrocotton organic film on the second-stage screen in two-stage series IR image converter tube are described.
论述红外二级串联变像管第二级屏工艺中硝棉有机膜的配方及工艺。
That's the familiar voice of Alan Alda, star of stage, screen and science.
大家现在听到的就是亚伦·艾达，这位舞台、银幕和科学方面的巨星的声音。
That's the familiar voice of Alan Alda, star of stage, screen and science.
大家现在听到的就是亚伦·艾达，这位舞台、银幕和科学方面的巨星的声音。
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