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