Category:Documents related to industry in Russia
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This category has only the following subcategory.
Media in category "Documents related to industry in Russia"
The following 2 files are in this category, out of 2 total.
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Патент способ нейтрализации кислых шахтных вод.jpg 2,550 × 3,510; 4.51 MB
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Патент Установка для откачки.jpg 2,484 × 3,484; 1.14 MB