However, in order to accommodate the multiple compressors, {TAIL ~ the housing} is substantially elongated in {HEAD ~ a horizontal dimension}, and the elongated side walls 23, 24 are substantially flat 
However , in order to accommodate the multiple compressors , { TAIL ~ the housing } is substantially elongated in { HEAD ~ a horizontal dimension } , and the elongated side walls 23 , 24 are substantially flat
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH