An improved I shaped track provides {TAIL ~ free roller movement} of the end portion of {HEAD ~ the respective water carrying connector pipes} which is connected to the sprinkler line 
An improved I shaped track provides { TAIL ~ free roller movement } of the end portion of { HEAD ~ the respective water carrying connector pipes } which is connected to the sprinkler line
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH