Due to {TAIL ~ differences} in the thermal expansion between the valve ball and the transport liquid, {HEAD ~ the valve} will, however, permit reverse thermosiphoning at high temperatures 
Due to { TAIL ~ differences } in the thermal expansion between the valve ball and the transport liquid , { HEAD ~ the valve } will , however , permit reverse thermosiphoning at high temperatures
OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH