Improved echo sounding equipment for the detection of shoals of bottom fish.
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| Format: | Texto biblioteca |
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| Published: |
1959
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| Subjects: | ECHOSOUNDING, FISH DETECTION, FISHING GEAR, ECHOSONDAGE, DETECTION DU POISSON, ENGIN DE PECHE, ECOSONDEO, DETECCION DE PECES, EQUIPO DE PESCA, |
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