After stopper has been brought into {HEAD ~ position} with its teeth 27 and 28 around {TAIL ~ surface} 31 nut 30 is tightened such that stopper 26 and hollow closed end needle 10 are fixedly connected 
around
After stopper has been brought into { HEAD ~ position } with its teeth 27 and 28 around { TAIL ~ surface } 31 nut 30 is tightened such that stopper 26 and hollow closed end needle 10 are fixedly connected
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH