... direct-expansion refrigerating plant 直接蒸发式冷冻装置 direct-heated cathode 直热式阴极 direct-listening sonar 噪声测向声纳 ...
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In this paper, a method of making high-quality direct-heated barium tungsten cathode using a home-made simple device instead of a costly special device hydrogen oven is introduced.
本文介绍了用自制的简易装置代替专用设备——烧氢炉制做高质量直热式钡钨阴极的方法。
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