However, if no drive 14 is provided, {HEAD ~ the rope drum} 18 is equipped with {TAIL ~ a locking device} 24 
is equipped with
However , if no drive 14 is provided , { HEAD ~ the rope drum } 18 is equipped with { TAIL ~ a locking device } 24
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH