On front surfaces thereof, {TAIL ~ gripper arms} 52, 54 have {HEAD ~ pins} 88, 90 projecting therefrom 
On front surfaces thereof , { TAIL ~ gripper arms } 52 , 54 have { HEAD ~ pins } 88 , 90 projecting therefrom
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH