The wall thicknesses of the walls 180 are very small and are typically in the range between 0.5 mm and 0.05 mm, as a result of which a construction of {HEAD ~ many parallel ducts} with {TAIL ~ a large total opening cross section} is implemented 
The wall thicknesses of the walls 180 are very small and are typically in the range between 0.5 mm and 0.05 mm , as a result of which a construction of { HEAD ~ many parallel ducts } with { TAIL ~ a large total opening cross section } is implemented
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH