Instead of digging into Belgium's Ypres Salient, archaeologists used lidar laser scanners to map the war zone and turn up some remarkable finds.
They pointed out the possibility of the annular jet to retain the oxygen at the interaction zone. O'Neill and Steen [40] proposed the utilization of an annular nozzle to control the purity of an oxygen jet into the cut kerf. The results suggest an increment of the oxygen concentration into...