锅炉轴线

barrel boiler of locomotive dome of boiler boiler barrel of locomotive upgrading of boiler weld inspection of the boiler principal axis of compliance drag axis of balance axis of constant moments axis of linear complex axis of swivel internal axis of similitude efficiency of boiler battery of boiler volume of boiler seating of boiler centreline of boiler heating surface of boiler lag of boiler bed of boiler specific capacity of boiler casing of a boiler shell of boiler