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