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G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
G01C9/00—Measuring inclination, e.g. by clinometers, by levels
G01C9/16—Measuring inclination, e.g. by clinometers, by levels by using more than one pendulum
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FR577801D1924-02-261924-02-26Appareil mesurant l'inclinaison d'un plan sur l'horizontale dans deux sens perpendiculaires l'un à l'autre
ExpiredFR577801A
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