In {HEAD ~ order} to achieve this value, {TAIL ~ the internal stresses σi} should therefore not amount to more than 3 N/mm2 
In { HEAD ~ order } to achieve this value , { TAIL ~ the internal stresses σi } should therefore not amount to more than 3 N / mm2
OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH