Wodoodporne ciągi naziemna cyfrowa geofonu GM Seria zwarta konstrukcja

GL Series Terrestrial Digital Geophone strings GM Series Marsh Digital Geophone String Fast detailed description: 1 good water resistance 2 it’s insulation resistance is no less than 300MΩ in 6 meters even more deep water after 48 hours 3 light weight and distortion Description: GM Series Marsh Digital Geophone String are a series of new marsh digital grade geophone strings,GM has good water resistance and it’s insulation resistance is no less than 300MΩ in 6 meters even more