{HEAD ~ Each} of {TAIL ~ the non ejection grooves} includes, on the first end thereof, an inclined surface which is inclined outward from a lower surface opening opened on a lower surface of the non ejection groove toward an upper surface opening opened on an upper surface thereof 
of
{ HEAD ~ Each } of { TAIL ~ the non ejection grooves } includes , on the first end thereof , an inclined surface which is inclined outward from a lower surface opening opened on a lower surface of the non ejection groove toward an upper surface opening opened on an upper surface thereof
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH