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| Circuit vent
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Plumbing drainage system vertical vent which is run from the last two traps on a horizontal drain line to the main vent stack of a building drainage system. |
| Circuit voltage
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Voltage in an electrical circuit. |
| Circular level
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With a circular level you can check to make sure your refrigerator, range, stereo, or washer and dryer are sitting on a level surface. |
| Circular measure
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A system of measuring circles in portions, of the entire circle, such as radians, degrees, minutes or seconds. |
| Circular mils (cm)
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Area of an electrical conductor measured in thousandths of an inch. |
| Circular saw
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Used for crosscuts and rip cuts, the circular saw's base plate can be adjusted to make bevel cuts. Typically, the circular saw is subjected to rougher treatment than most other portable power tools. Therefore, a frequently used circular saw requires heavy duty features such as beefed-up horsepower, carbide-tipped blades, ball and roller bearings and rugged gears. |
| Circular saw blade
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There are four different types of circular saw blades. |
| Circular stairs
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A spiral of stairs with threads that curve around a central point. |
| Circulate
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To move in a circle, circuit, or course and then return to the point of origin. |
| Circulating fluidized bed
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A type of furnace or reactor in which the emission of sulfur compounds is lowered by the addition of crushed limestone in the fluidized bed thus obviating the need for much of the expensive stack gas clean-up equipment. The particles are collected and recirculated, after passing through a conventional bed, and cooled by boiler internals. |
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