Popular Science(1944)

关键词： 纪录片 短片 战争

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Plot Summary:The first story in this series entry shows the Railroad Detector Car at work. Specialized electronic equipment detects defects in the rails that indicate excessive wear or stress, which could lead to accidents. A separate crew removes and inspects the suspect rail and, if necessary, installs a new one. The second story features an x-ray field unit for mobile military hospitals in combat zones.