E1T1H4Y4L1E1N1I1C3
17 points
ETHYLENIC is validvalid
of or like ethylene, a flammable gas, present in coal gas
of or like ethylene, a flammable gas, present in coal gas
of or like ethylene, a flammable gas, present in coal gas
of or like ethylene, a flammable gas, present in coal gas