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Propane is a three-carbon alkane with the molecular formula C3H8. It is a gas at standard temperature and pressure, but compressible to a transportable liquid. A by-product of natural gas processing and petroleum refining, it is commonly used as a fuel in domestic and industrial applications and in low-emissions public transportation. Discovered in 1857 by the French chemist Marcellin Berthelot, it became commercially available in the US by 1911. Propane is one of a group of liquefied petroleum gases (LP gases). The others include butane, propylene, butadiene, butylene, isobutylene, and mixtures thereof. Propane has less energy density, but burns cleaner, than gasoline and coal.
Polishing is the process of creating a smooth and shiny surface by rubbing it or by applying a chemical treatment, leaving a clean surface with a significant specular reflection. In some materials, polishing is also able to reduce diffuse reflection to minimal values.
Liquefied petroleum gas, is a flammable mixture of hydrocarbon gases used as fuel in heating appliances, cooking equipment, and vehicles.
Flagstone (flag) is a generic flat stone, sometimes cut in regular rectangular or square shape and usually used for paving slabs or walkways, patios, flooring, fences and roofing. It may be used for memorials, headstones, facades and other construction. The name derives from Middle English flagge meaning turf, perhaps from Old Norse flaga meaning slab or chip.
Masonite is a type of hardboard, a kind of engineered wood, which is made of steam-cooked and pressure-molded wood fibers in a process patented by William H. Mason. It is also called Quartrboard, Isorel, hernit, karlit, torex, treetex, and pressboard.
Buff is a light brownish yellow, ochreous colour, typical of buff leather. Buff is a mixture of yellow ocher and white: two parts of white lead and one part of yellow ocher produces a good buff, or white lead may be tinted with French ochre alone.
Jack Roush is the founder, CEO, and co-owner of Roush Fenway Racing, a NASCAR team headquartered in Concord, North Carolina, and is Chairman of the Board of Roush Enterprises.
French polishing is a wood finishing technique that results in a very high gloss surface, with a deep colour and chatoyancy. French polishing consists of applying many thin coats of shellac dissolved in denatured alcohol using a rubbing pad lubricated with one of a variety of oils. The rubbing pad is made of absorbent cotton or wool cloth wadding inside of a piece of fabric and is commonly referred to as a fad, also called a rubber, tampon, or muñeca.
Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. Finishing processes may be employed to: improve appearance, adhesion or wettability, solderability, corrosion resistance, tarnish resistance, chemical resistance, wear resistance, hardness, modify electrical conductivity, remove burrs and other surface flaws, and control the surface friction. In limited cases some of these techniques can be used to restore original dimensions to salvage or repair an item. An unfinished surface is often called mill finish.
The burnished-buff tanager, also known as the rufous-crowned tanager, is a common South American species of bird in the family Thraupidae.
The green-capped tanager is a species of bird in the family Thraupidae. It is endemic to forest edge and gardens at altitudes of 1450–2200 m. in Puno, Peru, and La Paz, Bolivia. It is fairly common and possibly spreading, but its small population has led to it being evaluated as Near Threatened by BirdLife International and IUCN. It closely resembles the widespread burnished-buff tanager, but its mantle is bluer (male) or greener (female), and its crown is greenish-buff. Its specific name commemorates the ornithologist Rodolphe Meyer de Schauensee.
Floor cleaning is a major occupation throughout the world. The main job of most cleaners is to clean floors.
Mass finishing is a group of manufacturing processes that allow large quantities of parts to be simultaneously finished. The goal of this type of finishing is to burnish, deburr, clean, radius, de-flash, descale, remove rust, polish, brighten, surface harden, prepare parts for further finishing, or break off die cast runners. The two main types of mass finishing are tumble finishing, also known as barrel finishing, and vibratory finishing. Both involve the use of a cyclical action to create grinding contact between surfaces. Sometimes the workpieces are finished against each other; however, usually a finishing medium is used. Mass finishing can be performed dry or wet; wet processes have liquid lubricants, cleaners, or abrasives, while dry processes do not. Cycle times can be as short as 10 minutes for nonferrous workpieces or as long as 2 hours for hardened steel.
Trisilane is the silane with the formula H2Si(SiH3)2. A liquid at standard temperature and pressure, it is a silicon analogue of propane. The contrast with propane however trisilane ignites spontaneously in air.
Daimabad is a deserted village and an archaeological site on the left bank of the Pravara River, a tributary of the Godavari River in Shrirampur taluka in Ahmednagar district of Maharashtra state in India. This site was discovered by B. P. Bopardikar in 1958. It has been excavated three times so far by the Archaeological Survey of India teams. The first excavation in 1958-59 was carried out under the direction of M. N. Deshpande. The second excavation in 1974-75 was led by S. R. Rao. Finally, the excavations between 1975-76 and 1978-79 were carried out under the direction of S. A. Sali. Discoveries at Daimabad suggest that Late Harappan culture extended into the Deccan Plateau in India. Daimabad is famous for the recovery of many bronze goods, some of which were influenced by the Harappan culture.
A blowtorch, is a fuel-burning tool used for applying flame and heat to various applications, usually metalworking.
Ard Tlaili or Tell Ard Tlaili is a small tell mound archaeological site in a plain at the foot of the Lebanon Mountains 11 km (7 mi) northwest of Baalbeck, in the Beqaa Valley in Lebanon.
A floor scrubber is a floor cleaning device. It can be a simple tool such as a floor mop or floor brush, or in the form of a walk-behind or a ride-on machine to clean larger areas by injecting water with cleaning solution, scrubbing, and lifting the residue off the floor. With advancements in robotics, autonomous floor-scrubbing robots are available as well.
Stilpnia is a genus of Neotropical birds in the tanager family Thraupidae.
References
- ↑ "Hard floor machine types". floorbuffers.com.
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