PL264201A2 - Method of driving tunnels and passages lined with prefabricated units and prefabricated unit for lining tunnels and passages
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Method of driving tunnels and passages lined with prefabricated units and prefabricated unit for lining tunnels and passages
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Priority to PL26420187ApriorityCriticalpatent/PL150008B2/en
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Publication of PL150008B2publicationCriticalpatent/PL150008B2/en
PL26420187A1987-02-181987-02-18Method of driving tunnels and passages lined with prefabricated units and prefabricated unit for lining tunnels and passages
PL150008B2
(en)