{HEAD ~ A spring} 72 of {TAIL ~ adequate stiffness} biases the drivetrain assembly 71 forward in the tool housing 
of
{ HEAD ~ A spring } 72 of { TAIL ~ adequate stiffness } biases the drivetrain assembly 71 forward in the tool housing
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH