As shown in FIG 7a and further in FIG 8a, this action stretches the center section of the fabric between elements 48, 48, increasing the open space, {HEAD ~ i.e. porosity}, of {TAIL ~ the fabric} 
of
As shown in FIG 7a and further in FIG 8a , this action stretches the center section of the fabric between elements 48 , 48 , increasing the open space , { HEAD ~ i.e. porosity } , of { TAIL ~ the fabric }
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 OTH REL TAIL TAIL TAIL TAIL TAIL TAIL