| 其他書名 | Manufacturers of Hydraulic Passenger and Freight, Electric Passenger and Freight, Patent Steel Screw Belt Passenger and Freight, Patent Spur Gear Freight, Hand and Sidewalk Elevators |
| 出版 | Graves Elevator Company, 1893 |
| URL | http://books.google.com.hk/books?id=gXx-swEACAAJ&hl=&source=gbs_api |