 |
The head of an impact sprinkler, a type of irrigation sprinkler in which the sprinkler head, driven in a circular motion by the force of the outgoing water, pivots on a bearing on top of its threaded attachment nut. Invented in 1935 by Orton Englehardt, it quickly found widespread use. Photograph: JJ Harrison
|
from Wikipedia picture of the day feed http://ift.tt/1SFfAwc
0 comments:
Post a Comment