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Priority to RO13269988ApriorityCriticalpatent/RO102457B1/en
Publication of RO102457B1publicationCriticalpatent/RO102457B1/en
RO13269988A1988-03-231988-03-23Apparatus for determining the admissible working speed of a column of drilling pipes or of a column of tubes
RO102457B1
(en)