{HEAD ~ The breather bag} is vertically mounted to {TAIL ~ a top surface} of the mounting surface structure 
{ HEAD ~ The breather bag } is vertically mounted to { TAIL ~ a top surface } of the mounting surface structure
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH