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