Typically, {HEAD ~ side arms} provided on such needle housings are at {TAIL ~ an angle} of 30 degrees relative to the axis of the needle 
are at
Typically , { HEAD ~ side arms } provided on such needle housings are at { TAIL ~ an angle } of 30 degrees relative to the axis of the needle
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH