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Application filed by B Pk Mech BudownictwafiledCriticalB Pk Mech Budownictwa
Priority to PL21228478ApriorityCriticalpatent/PL113277B2/pl
Publication of PL212284A1publicationCriticalpatent/PL212284A1/pl
Publication of PL113277B2publicationCriticalpatent/PL113277B2/pl
PL21228478A1978-12-291978-12-29Frontal working member of an apparatus for horizontallyforeing-through pipes,especially those made of reinforced concrete
PL113277B2
(en)