Since {HEAD ~ the fans} 54 and 66 can enjoy {TAIL ~ increased setting space}, large sized fans can be used for them 
Since { HEAD ~ the fans } 54 and 66 can enjoy { TAIL ~ increased setting space } , large sized fans can be used for them
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH