登入選單
返回Google圖書搜尋
Telephone-exchange System
Felix Benedict Herzog
其他書名
Specification Forming Part of Letters Patent No. 292,115, Dated January 15, 1884
出版N. Peters, Photo-Lithographer, 1884
URLhttp://books.google.com.hk/books?id=2UwkQwAACAAJ&hl=&source=gbs_api