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Priority to NO822116ApriorityCriticalpatent/NO156537C/en
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Publication of NO156537BpublicationCriticalpatent/NO156537B/en
Publication of NO156537CpublicationCriticalpatent/NO156537C/en
NO822116A1982-06-241982-06-24
PROCEDURE AND DEVICE FOR AA CONNECT A TWO ROOM IN MOUNTAIN LOCATED UNDER WATER WITH A PREFABRICATED CONCRETE BOX WITH SLUSE.
NO156537C
(en)