ตัวกรองผลการค้นหา
หรือคุณกำลังค้นหา B Elevation, A Elevation, Back Draft
B Elevation
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.
A Elevation
แปลว่า(English) The top level of the boiler firebox where four oil guns are located. The oil guns are used to produce steam and maintain pressure while the boiler is on oil fire.