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