The longitudinal section of {HEAD ~ the solid portion} around {TAIL ~ the holes} of 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 
The longitudinal section of { HEAD ~ the solid portion } around { TAIL ~ the holes } of 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH