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A propane torch is a tool normally used for the application of flame or heat which uses propane, a hydrocarbon gas, for its fuel and ambient air as its combustion medium. Propane is one of a group of by-products of the natural gas and petroleum industries known as liquefied petroleum gas (LPG). Propane and other fuel torches are most commonly ...
Commercial barbecue grills can be stationary or transportable. An example of a stationary grill is a built-in pit grill, for indoor or outdoor use. Construction materials include bricks, mortar, concrete, tile and cast iron. Most commercial barbecue grills, however, are mobile, allowing the operator to take the grill wherever the job is.
Fire alarm control panels are usually found in an electrical or panel room. Fire alarm systems generally use visual and audio signalization to warn the occupants of the building. Some fire alarm systems may also disable elevators, which are unsafe to use during a fire under most circumstances. [1]
Many are powered by natural gas or propane, but there are electric models as well. In addition, there are models made for indoor or outdoor cooking that can be fixed (built-in) or portable (wheeled or free-standing). Flattop grills can be contrasted with open-flame grills, which cook food over a grate with direct or indirect flame.
The larger torches may have a heavy fuel reservoir placed on the ground, connected by a hose. This is common for butane- or propane-fuelled gas torches, but also applies to the older, large liquid paraffin (kerosene) torches such as the Wells light. Many torches use a hose-supplied gas feed, which can be mains gas when used in industrial settings.
Coded panels were the earliest type of central fire alarm control, and were made during the 1800s to the 1970s. A coded panel is similar in many ways to a modern conventional panel (described below), except each zone was connected to its own code wheel, which, depending on the way the panel was set up, would either do sets of four rounds of code until the initiating pull station was reset ...
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