The valve device in the closed system, in which the bellows 11 and 12 are parts, takes a position such that {HEAD ~ flow} from {TAIL ~ the bellows} 11 into the bellows 12 is stopped 
from
The valve device in the closed system , in which the bellows 11 and 12 are parts , takes a position such that { HEAD ~ flow } from { TAIL ~ the bellows } 11 into the bellows 12 is stopped
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH