The transfer chamber is sized so that {TAIL ~ a workpiece} may pass between {HEAD ~ the chambers} 
The transfer chamber is sized so that { TAIL ~ a workpiece } may pass between { HEAD ~ the chambers }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD