The clamping ring is then easily accessible and can be connected without difficulty to {HEAD ~ the means} for changing {TAIL ~ its diameter} 
for changing
The clamping ring is then easily accessible and can be connected without difficulty to { HEAD ~ the means } for changing { TAIL ~ its diameter }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL