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