G. Maas · 3 obras en el catálogoObrasEEnterprising AfricaEnterprising AfricaDDescription and use of the suspended rail joint for railroadDescription and use of the suspended rail joint for railroads with suspended rail ends, which can be shortened to one's liking or differently long, on a single joint sleeper ...DDescription and application of the semaphore with glas panelDescription and application of the semaphore with glas panels, which is clearly visible on both bright and dark backing, no matter whether the source of light be before or behind the onlooker
DDescription and use of the suspended rail joint for railroadDescription and use of the suspended rail joint for railroads with suspended rail ends, which can be shortened to one's liking or differently long, on a single joint sleeper ...
DDescription and application of the semaphore with glas panelDescription and application of the semaphore with glas panels, which is clearly visible on both bright and dark backing, no matter whether the source of light be before or behind the onlooker