Surveyor's wheel
Distance-measuring device
A surveyor's wheel, also called a clickwheel, hodometer, waywiser, trundle wheel, measuring wheel or perambulator is a device for measuring distance.
From Wikipedia, under CC BY-SA. More on occurri.
Distance-measuring device
A surveyor's wheel, also called a clickwheel, hodometer, waywiser, trundle wheel, measuring wheel or perambulator is a device for measuring distance.
From Wikipedia, under CC BY-SA. More on occurri.