the telescopic actuator converts {HEAD ~ a rotation} of {TAIL ~ a rotating shaft} of a motor into expansion and contraction movements of an output rod via the planetary reduction gear and the screw feed mechanism 
of
the telescopic actuator converts { HEAD ~ a rotation } of { TAIL ~ a rotating shaft } of a motor into expansion and contraction movements of an output rod via the planetary reduction gear and the screw feed mechanism
OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH