แปลว่า(english) The bottom level of the boiler firebox where two oil guns are located. The oil guns are used if the boiler needs extra steam while on oil fire.
B Elevation
คำศัพท์ภาษาอังกฤษ
คำศัพท์ภาษาอังกฤษ
แปลว่า(english) The bottom level of the boiler firebox where two oil guns are located. The oil guns are used if the boiler needs extra steam while on oil fire.
