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| способ Гунтингтона — Геберлейна (двухступенчатый обжиг свинцовых руд или концентратов сначала в механических печах, а затем в агломерационных котлах) | |||
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H .H.-Verfahren : 5 phrases in 4 subjects |
| Automobiles | 2 |
| Electrochemistry | 1 |
| Optics branch of physics | 1 |
| Sensitometry | 1 |
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