BR7802962A - Aperfeicoamento em brocas para perfuracoes subterraneas
- Google Patents
Aperfeicoamento em brocas para perfuracoes subterraneas
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Publication number
BR7802962A
BR7802962ABR7802962ABR7802962ABR7802962ABR 7802962 ABR7802962 ABR 7802962ABR 7802962 ABR7802962 ABR 7802962ABR 7802962 ABR7802962 ABR 7802962ABR 7802962 ABR7802962 ABR 7802962A
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Application filed by S NakaharafiledCriticalS Nakahara
Priority to BR7802962ApriorityCriticalpatent/BR7802962A/pt
Publication of BR7802962ApublicationCriticalpatent/BR7802962A/pt