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85.40 热电子管、冷阴极管或光阴极管(例如,真空管或充气管、汞弧整流管、阴极射线管、电视摄像管):
85.40 Thermionic, cold cathode or photo-cathode valves and tubes (for example, vacuum or vapour or gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray tubes, television camera tubes):


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