According to FIGS 2 and 3, {HEAD ~ the lance} 3, in its head 8, contains {TAIL ~ an inner passage} 10 for liquid fuel and an outer passage 11 for gaseous fuel 
According to FIGS 2 and 3 , { HEAD ~ the lance } 3 , in its head 8 , contains { TAIL ~ an inner passage } 10 for liquid fuel and an outer passage 11 for gaseous fuel
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH