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