{HEAD ~ Air conditioner} 24, wherein the U shaped tube is provided with a bore in the proximity of the floor of {TAIL ~ the collector} 
{ HEAD ~ Air conditioner } 24 , wherein the U shaped tube is provided with a bore in the proximity of the floor of { TAIL ~ the collector }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL