Prussian semaphore system

telegraphic communications system used between Berlin and the Rhine Province from 1832 to 1849

en-GB/ˈpɹʌʃn ˈsɛməfɔːɹ ˈsɪstəm/
en-US/ˈpɹʌʃən ˈsɛməˌfoʊɹ ˈsɪstəm/

دسته بندی ها:

semaphore lineorganizationcommunications system