Boilers may be broadly classified as shell, fire-tube and water-tube types.
人们一般把它分为锅壳型，烟管型和水冷管型等类型。
2
The strengthener has been applied to the fire-tube boilers on the Daqing Oilfield, and the effect of energy saving is remarkable.
将此应用于大庆油田的火管式锅炉，取得了显著的节能效果。
3
Electric design in making medicament from power distribution electric, luminance, annihilating germ by ultraviolet radiation, fire alarm, wire and tube and so on, was discussed briefly in this paper.