{HEAD ~ The tank filling pipe} can also be sealed airtight by {TAIL ~ the closure flap} or by a closure valve arranged in the tank filling pipe 
sealed airtight by
{ HEAD ~ The tank filling pipe } can also be sealed airtight by { TAIL ~ the closure flap } or by a closure valve arranged in the tank filling pipe
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH