Definitionen
1.NounA pipe to conduct something downwards.
A large external pipe in a water-tube boiler, carrying unheated water from the steam drum down to the water drum as part of the circulation path.
A pipe for leading the hot gases from the top of a blast furnace downward to the regenerators, boilers, etc.
2.NounA large external pipe in a water-tube boiler, carrying unheated water from the steam drum down to the water drum as part of the circulation path.
3.NounA pipe for leading the hot gases from the top of a blast furnace downward to the regenerators, boilers, etc.