instrument
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Surveyor operating the dumpy automatic level instrument at construction site
Surveyor operating the dumpy automatic level instrument at construction site
Surveyor gesturing after taking readings of dumpy automatic level instrument
Surveyor gesturing after taking readings of dumpy automatic level instrument at construction site
Engineer operating the dumpy automatic level instrument at construction site
Engineer operating the dumpy automatic level instrument at construction site
Engineer instructing while operating dumpy automatic level instrument at site
Engineer instructing while operating dumpy automatic level instrument at construction site