As such, {TAIL ~ vibration events} occurring during {HEAD ~ seismic surveys} do not need to be slowed or delayed 
As such , { TAIL ~ vibration events } occurring during { HEAD ~ seismic surveys } do not need to be slowed or delayed
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH