The second valve is provided in {TAIL ~ the second connection passage} to open and close {HEAD ~ the second connection passage} 
The second valve is provided in { TAIL ~ the second connection passage } to open and close { HEAD ~ the second connection passage }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD