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真空电子束焊
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真空电子束焊
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vacuum electron beam welding
真空电子束焊
在真空环境下,利用高速电子会聚形成的电子束流轰击被焊金属连接部位,产生的热量使被焊金属熔化,从而实现连接的焊接方法。
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labile iron pool
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lab on a chip
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lab on a valve
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Laboratoire d'Hydraulique Saint-Venant
laboratorial radioactivity survey nstrument
laboratorial simulation of nuclear weapon physics
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Laboratory Astrophysics
laboratory astrophysics
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