The guide member is held in {TAIL ~ position} by a column support between the housing and the upper side of {HEAD ~ the guide} 
The guide member is held in { TAIL ~ position } by a column support between the housing and the upper side of { HEAD ~ the guide }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD