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