The suction heads 21a, 21b and 21c have {HEAD ~ their increased diameter base portions} 31 closely engaged in {TAIL ~ the recesses} 29 in the head holders 22 
closely engaged in
The suction heads 21a , 21b and 21c have { HEAD ~ their increased diameter base portions } 31 closely engaged in { TAIL ~ the recesses } 29 in the head holders 22
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH