The longitudinal section of the solid portion around {HEAD ~ the holes} of {TAIL ~ the conductive porous structure} is formed into an essentially egg like shape, and the acute angle side of the egg like longitudinal sectional shape is disposed so as to direct to the waterproof membrane 
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The longitudinal section of the solid portion around { HEAD ~ the holes } of { TAIL ~ the conductive porous structure } is formed into an essentially egg like shape , and the acute angle side of the egg like longitudinal sectional shape is disposed so as to direct to the waterproof membrane
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH