The holding members are separated or isolated from the slider, to assure {HEAD ~ smooth sliding movement} of {TAIL ~ the slider} 
The holding members are separated or isolated from the slider , to assure { HEAD ~ smooth sliding movement } of { TAIL ~ the slider }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL