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Glossary

dumbwaiter

A hoisting and lowering mechanism within a building equipped with a relatively small car which moves in a vertical direction […]

Glossary

dumbbell tenement

A multiple-dwelling substandard apartment building; commonly three to five stories high, containing relatively long narrow apartments within it; has windows

Glossary

dug well

A well for water, constructed by excavating a large-diameter shaft and installing a casing.

Glossary

dugout

A primitive shelter, often consisting of an excavation in a bank of sloping terrain that is roofed with bark laid

Glossary

due care

The standard of reasonable care, skill, ability, and judgment which, if not met, constitutes negligence; such a standard may be

Glossary

ductwork

The ducts in a heating, ventilating, or air-conditioning system.

Glossary

duct system

A series of ducts and associated elbows, connectors, dampers, and air outlets used to convey air from a fan to

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