Two motor compressor units of the vertical shaft type are housed in {HEAD ~ spaced parallel relation} in {TAIL ~ a common sealing housing} 
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Two motor compressor units of the vertical shaft type are housed in { HEAD ~ spaced parallel relation } in { TAIL ~ a common sealing housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL