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