A slide valve 3 including a groove in {HEAD ~ said guide member} for receiving {TAIL ~ an end} of said support column 
for receiving
A slide valve 3 including a groove in { HEAD ~ said guide member } for receiving { TAIL ~ an end } of said support column
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH