{HEAD ~ The waterproof cover} is fixed to the compressor housing by {TAIL ~ a ring shaped fastener}  
{ HEAD ~ The waterproof cover } is fixed to the compressor housing by { TAIL ~ a ring shaped fastener }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH