{HEAD ~ The apparatus} 4, wherein {TAIL ~ the projecting part} is integrally formed with a main body of the mask 
wherein
{ HEAD ~ The apparatus } 4 , wherein { TAIL ~ the projecting part } is integrally formed with a main body of the mask
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH