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单词 batt
释义 batt
[bat]
MATERIALS
A blanket of insulating material usually 16 inches (41 centimeters) wide and 3 to 6 inches (8 to 15 centimeters) thick, used to insulate building walls and roofs.
MINING ENGINEERING
A thin layer of coal occurring in the lower part of shale strata that lie above and close to a coal bed.
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