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Страница 3373
Опубликовано:
15.02.1981 | Номер патента: 804838 | Авторы:
Барский,
Белый,
Вялов,
Меликсетов,
Редько,
Сапронов,
Смирнов | Метки:
водонасыщенных,
неустойчивыхпородах,
сооружения,
ствола,
шахтыв | МПК:
E21D 1/12
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