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fabricating technique for exclusive part of vacuum electron device
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fabricating technique for exclusive part of vacuum electron device
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工学
真空电子器件制造工艺
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fabricating technique for exclusive part of vacuum electron device
真空电子器件专用零件加工工艺
真空电子器件中由各种金属、石墨、陶瓷和云母等材料制成的零件的加工工艺。
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Hongqilapu Daban
Hongqiling copper nickel deposit
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Hongqi Qu
Hongqi series sedan
Hongqi Weekly
Hong Quan
Hong Ren
Hong Rengan
Hongru River
Hong Sanhe
Hong's Collection of Effective Recipes,block-printed edition by Gushujunzhai,sixth year of Qiandao era,Song Dynasty
Hong Seong-won
Hong Se-seop
Hongshan Culture
Hongshan Culture hooked cloud-shaped jades
Hongshan Culture oblique mouth cylinder-shaped jades
Hongshanmiao
Hongshan opera
Hongshan Qu
Hongshan Reservoir
Hong Shen
Hong Sheng
Hong Sheng and Kong Shangren
Hong Shilv
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