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