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9V Battery Operated 30-500m Depth Sounder Ruler Tape Water Level

9V Battery Operated 30-500m Depth Sounder Ruler Tape Water Level Meter with Probe for Borehole Depth - China Well Water Level Meter, Deep Water Well Level Meter

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9V Battery Operated 30-500M Sounder Ruler Tape Water Level Meter With Probe For Borehole Depth - AliExpress