불꽃경화

Flame Hardening

불꽃심

Flame Cone

불꽃어닐링

Flame Annealing

불꽃전파용접

Fire Cracker Welding

불꽃절단

Flame Cutting

불꽃절삭

Flame Machining

불꽃점화

Jump Spark Ignition, High Tension Ignition

불꽃조정

Flame Adjustment

불꽃청소

Flame Cleaning

불꽃홈파기

Flame Gouging