at least one reinforcing frame rib, attached to {TAIL ~ said stationary cylindrical casing} between {HEAD ~ said pair} of opposite gables, 
at least one reinforcing frame rib , attached to { TAIL ~ said stationary cylindrical casing } between { HEAD ~ said pair } of opposite gables ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH