Blue links lead to the fully translated html versions of the page, purple links lead to pages whose start pages (as well as introductions and tables of contents at least) are already set up, green links lead to extern sites, grey means that no file is available yet).
/Notes in this color and between two / are from the operator of the German mirror site and translator/.
Another old replica of "houfeng didongy yi". It too reflects very well the parabolic shape of the "antenna chamber" of this device. In 2003, it was shown on the website of "Albertson College" of Idaho, USA.