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| Drop hammer
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Casting made of heavy steel, which is raised and then dropped, from a certain height to drive pilings into the ground. |
| Drop leaf
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Table extension, which is hinged to a side, so that it can be folded under when not needed. |
| Drop light
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Electric light on a long cord hanging over a work area, providing direct lighting. |
| Drop outlet
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Gutter system fitting, which feeds into a downspout to drain water that has collected in a gutter. |
| Drop siding
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Siding boards with a tapered cross-section, of which, the top edge is narrower. Installed horizontally, the top edge fits into a groove in the bottom edge of the board above it. |
| Dropped ceiling
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Flat ceiling, which is built lower than the original ceiling. |
| Dropping a hip rafter
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To prevent the upper edges of a hip rafter from projecting over the plane of the adjoining roof, a deep seat cut is made so that the hip rafter sits lower than the surrounding roof framing. |
| Drum
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(1) Any of various drum-like cylindrical objects or containers. (2) Rotating, power-driven cylinder used as a hoist by wrapping a hoisting rope, which is attached by a pulley or pulleys, to the load being hoisted. |
| Drum sander
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Rubber drum, mounted on an arbor, which is held in the chuck of a motor that turns, thereby rubbing its cover of abrasive material, against the work that is held against it for sanding. |
| Drum trap
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Plumbing fixture, which is cylindrical in shape, which retains water as a seal, with an outlet at its top and an inlet at its base. Used in plumbing fixtures that are too low to the floor for installation of a P-trap. |
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