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