Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Etat Francais
Original Assignee
Etat Francais
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Publication date
Application filed by Etat FrancaisfiledCriticalEtat Francais
Priority to FR7604998ApriorityCriticalpatent/FR2342485A1/fr
Publication of FR2342485A1publicationCriticalpatent/FR2342485A1/fr
Application grantedgrantedCritical
Publication of FR2342485B1publicationCriticalpatent/FR2342485B1/fr
G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Drilling And Boring
(AREA)
Length Measuring Devices Characterised By Use Of Acoustic Means
(AREA)
Earth Drilling
(AREA)
FR7604998A1976-02-241976-02-24Procede de controle d'un percage et dispositif a ultrasons destine a la mise en oeuvre du procede
GrantedFR2342485A1
(fr)