There are a lot of vanes in a human body. Everywhere you look on
your body there probably will be vanes
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there are three major types vanes are used for a centrifugal
pumps those are
1.forward curved vanes
2.backward curved vanes
3.flat vanes
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Weather vanes, or wind vanes measure the direction of the wind.
Airports generally have high tech instruments to measure the
weather as opposed to regular weather vanes.
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There is no standard collective noun for weather vanes, most likely because weather vanes are seldom found in groups.
However, a place that sells weather vanes might have a display of weather vanes or someone who loves all types of weather vanes might have a collection of weather vanes.