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Priority to FI941754ApriorityCriticalpatent/FI97421C/fi
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Publication of FI941754ApublicationCriticalpatent/FI941754A/fi
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Publication of FI97421CpublicationCriticalpatent/FI97421C/fi
Система, предназначенная для использования в стволе скважины для соединения в осевом направлении конца трубчатого элемента и оправки, и соединительный узел для этой системы