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  2. Propane - Wikipedia

    en.wikipedia.org/wiki/Propane

    The wholesale price of propane in the summer of 2018 was between 86 cents to 96 cents per U.S. gallon, based on a truckload or railway car load. The price for home heating was exactly double that price; at 95 cents per gallon wholesale, a home-delivered price was $1.90 per gallon if ordered 500 gallons at a time.

  3. Petrochemical - Wikipedia

    en.wikipedia.org/wiki/Petrochemical

    Petrochemical plant in Saudi Arabia. Petrochemicals (sometimes abbreviated as petchems [1]) are the chemical products obtained from petroleum by refining. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as maize, palm fruit or sugar cane.

  4. Liquefied petroleum gas - Wikipedia

    en.wikipedia.org/wiki/Liquefied_petroleum_gas

    2 per unit of energy than does coal or oil, but more than natural gas. It emits 81% of the CO 2 per kWh produced by oil, 70% of that of coal, and less than 50% of that emitted by coal-generated electricity distributed via the grid. [40] Being a mix of propane and butane, LPG emits less carbon per joule than butane but more carbon per joule than ...

  5. Baseboard - Wikipedia

    en.wikipedia.org/wiki/Baseboard

    MDF (medium-density fiberboard) is a common material used for baseboard trim and molding. It is an engineered wood product manufactured from refined wood fibers combined with wax and resin binders. MDF is denser and more rigid than standard particle board. Compared to solid wood trim, MDF baseboard has the advantage of being consistent in ...

  6. Rotational molding - Wikipedia

    en.wikipedia.org/wiki/Rotational_molding

    Rotational molding had developed further when R.J. Powell made mention of the commonly used ratio of 4:1 between major and minor axes of rotation at slow rotation speeds. His patent covered this process for molding hollow objects from plaster of Paris in the 1920s. These early methods using different materials directed the advances in the way ...

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