draft furnace造句

African ironworkers regularly produced inhomogeneous steel blooms, especially in the large natural-draft furnaces.
The natural-draft furnace was the one African innovation in ferrous metallurgy that spread widely.
Natural-draft furnaces for smelting were generally discounted as being inefficient and unreliable, because of the vagaries of the winds.
But not all large scale iron production in Africa was associated with natural draft furnaces those of Meroe ( Sudan, first to fifth centuries CE ) were produced by slag-tapping bellows-driven furnaces, and the large 18th-19th century iron industry of the Cameroon grasslands by non-tapping bellows-driven furnaces.
Natural draft furnaces were particularly characteristic of African savanna woodlands, and were used in two belts across the Sahelian woodlands from Senegal in the west to Sudan in the east, and in the " Brachystegia-Julbenardia " ( miombo ) woodlands from southern Tanzania south to northern Zimbabwe.
It's difficult to find draft furnace in a sentence. 用draft furnace造句挺难的

This was the natural-draft furnace, which is designed to reach the temperatures necessary to form and drain slag by using a chimney effect hot air leaving the topic of the furnace draws in more air through openings at the base . ( Natural-draft furnaces should not be confused with wind-powered furnaces, which were invariably small ).
This was the natural-draft furnace, which is designed to reach the temperatures necessary to form and drain slag by using a chimney effect hot air leaving the topic of the furnace draws in more air through openings at the base . ( Natural-draft furnaces should not be confused with wind-powered furnaces, which were invariably small ).
The oldest natural-draft furnaces yet found are in Burkina Faso and date to the seventh / eight centuries The large masses of slag ( 10, 000 to 60, 000 tons ) noted in some locations in Togo, Burkina Faso and Mali reflect the great expansion of iron production in West Africa after 1000 CE that is associated with the spread of natural-draft furnace technology.
The oldest natural-draft furnaces yet found are in Burkina Faso and date to the seventh / eight centuries The large masses of slag ( 10, 000 to 60, 000 tons ) noted in some locations in Togo, Burkina Faso and Mali reflect the great expansion of iron production in West Africa after 1000 CE that is associated with the spread of natural-draft furnace technology.