{HEAD ~ An inertia disc} mounts within the housing, mounting to {TAIL ~ the housing} through a spherical bearing which permits rotational and radial displacement of the inertia disc relative to the housing 
mounting to
{ HEAD ~ An inertia disc } mounts within the housing , mounting to { TAIL ~ the housing } through a spherical bearing which permits rotational and radial displacement of the inertia disc relative to the housing
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH