The apparatus 1, wherein {HEAD ~ said apparatus} further comprising {TAIL ~ an air adjustment} means provided in the inlet portion of said air inlet passage for adjusting the amount of the air introducing into the combustion chamber and the swirling force 
The apparatus 1 , wherein { HEAD ~ said apparatus } further comprising { TAIL ~ an air adjustment } means provided in the inlet portion of said air inlet passage for adjusting the amount of the air introducing into the combustion chamber and the swirling force
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL 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