{HEAD ~ A cover plate} encloses {TAIL ~ the internal chamber} housing the inertia disc, and the internal chamber is filled with elastomeric urethane 
encloses
{ HEAD ~ A cover plate } encloses { TAIL ~ the internal chamber } housing the inertia disc , and the internal chamber is filled with elastomeric urethane
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH