| 其他書名 | Industrial and Mine Axles, Forgings ... Rolled Products ... Specifications ... Pollak Special Heat-treated Axles and Forgings, "Posco" Porducts, Drop Forgings ... |
| 出版 | Pollak Steel Company, 1919 |
| URL | http://books.google.com.hk/books?id=DTlGAAAAYAAJ&hl=&source=gbs_api |