| 摘要 |
An adjustable orifice sprinkler unit includes a tubular body member with a rotatable cap mounted on one end thereof that cooperates with peripheral edges of the tubular body member for defining an adjustable arc spray orifice for adjusting a spray pattern from an angle of from about 0 degrees up to about 360 degrees with the cap adjustable axially of the tubular body member for selectively adjusting the height of the orifice opening.
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