In addition to shear actuation, directional actuation and {HEAD ~ damping} may be effected using methods or {TAIL ~ devices} of the invention 
In addition to shear actuation , directional actuation and { HEAD ~ damping } may be effected using methods or { TAIL ~ devices } of the invention
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH