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| Beehive strainer
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A strainer inserted into a urinal to prevent foreign matter from falling into the drain. |
| Beeswax
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| Before sheathing window
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Term for a window, which is, installed prior to the sheathing being installed, having an extra strip of wood on the side that is nailed directly through to the studs. It is more difficult to install than a window that is installed after sheathing. |
| Before-tax income
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Total income prior to deduction of taxes. |
| Bell
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The end of a pipe or filling which is enlarged and designed to receive the straight end of a length of pipe. |
| Bell and spigot piping
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Also called hub and spigot piping this gravity-rated vent and drain or pressure piping, has a bell-shaped section at one end with a straight section at the other. The straight part fits into the bell-shaped end as pipe is being installed. |
| Bell caisson
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To provide more surface bearing area, this caisson pile has a 60 degree flare at the bottom. |
| Bell mouthing
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The boring of a hole in something that becomes flared at the opening, making the mouth of the hole larger than the inside diameter of the hole. |
| Bell wire
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Low voltage, small sized electrical wire used most often to connect a door bell to its power source. |
| Bellows
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Device that produces a stream of air through a narrow tube when its sides are pressed together. It draws air through a on-way valve into a flexible chamber and then, when the sides are pressed, forces the air out. |
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