Stamps of Germany, Large blast furnace with hot blast stove system design
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postage
1975, May 15 1975 issue - technology (1975) unwmk p. 14
| X | 160 | grn | Large blast furnace with hot blast stove system |
1 to 1 of 1
| X | 160 | grn | Large blast furnace with hot blast stove system |