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| BLOWN OIL
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Increased viscosity vegetable oil, saturated with air. |
| BLOWN-IN INSULATION
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Insulation that is inserted into walls or other areas by being "blown in". Commonly used in attic floors or other areas that are inaccessible for normal installation, it can also be pumped into wall cavities through small openings in the sheathing. |
| BLOWN-OUT WATER CLOSET
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A water closet bowl having a non-siphoning trapway at the rear of the bowl, and an integral flushing rim and jet. |
| BLOWPIPE
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Soldering or brazing torch used in jewelry making or other work with fine joints because of its ability to be accurately directed due to its small flame. |
| BLOWTORCH
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Torch used for soldering, activated by pressurized fuel and atmospheric air to generate its flame. |
| BLUE BOARD
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Water-resistant drywall which is commonly used in bathrooms. Blue paper covers it, giving it its name. |
| BLUE LEAD
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Rust preventative made of lead sulfide and carbon. |
| BLUE SKY LAWS
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State statutes that protect the public against securities frauds of real estate companies. These include regulations over the licensing of brokers, registrations, new securities and formal approvals by applicable government agencies. |
| BLUE STAIN
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Discoloration of sapwood due to fungus. |
| BLUE TOP
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Blue topped, wooden stake, which is used to mark for grading. |
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