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