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Dichlorodifluoromethane (R-12) is a colorless gas usually sold under the brand name Freon-12, and a chlorofluorocarbon halomethane (CFC) used as a refrigerant and aerosol spray propellant. In compliance with the Montreal Protocol, its manufacture was banned in developed countries (non-article 5 countries) in 1996, and in developing countries ...
HC-12a, also called ES-12a, OZ-12a, DURACOOL 12a [1] and Hydrocarbon Blend B, is a "drop-in" replacement refrigerant for Freon-12 and to a lesser extent, R-134a.HC-12a is a mixture of hydrocarbons, specifically propane (R-290) and isobutane (R-600a), and is therefore considered nearly non-ozone-depleting compared to dichlorodifluoromethane (R-12, Freon-12) or 1,1,1,2-tetrafluoroethane (R-134a).
R-12 Dvina. Soviet R-12 (NATO designation SS-4) in Kapustin Yar museum, Znamensk, Russia. The R-12 Dvina was a theatre ballistic missile developed and deployed by the Soviet Union during the Cold War. Its GRAU designation was 8K63 (8K63U or 8K63У in Cyrillic for silo-launched version), and it was given the NATO reporting name of SS-4 Sandal.
R1. Explosive when dry. R2. Risk of explosion by shock, friction, fire, or other sources of ignition. R3. Extreme risk of explosion by shock, friction, fire, or other sources of ignition. R4. Forms very sensitive explosive metallic compounds. R5.
Heated shot or hot shot is round shot that is heated before firing from muzzle-loading cannons, for the purpose of setting fire to enemy warships, buildings, or equipment. The use of heated shot dates back centuries. It was a powerful weapon against wooden warships, where fire was always a hazard.
September 4, 2024 at 8:01 AM. Texas police are investigating a shooting and carjacking in Houston over the weekend that left a 90-year-old man dead. The Houston Police Department reported that the ...
Personally made firearms that fire one shot at a time are legal, as is 3D printing certain guns as a hobbyist. But further manufacturing faces a key legal test in October when the Supreme Court ...
Model 1.32 caliber 7-shot or .38 Caliber 5-shot, spur trigger single-action revolver, 3-inch octagonal barrel, fluted cylinder, flat frame, saw-handle square butt, plain walnut or black checkered rubber grips, marked HARRINGTON & RICHARDSON, WORCESTER, MASS. PAT. MAY 23, 1876. Approximately 3,000 were manufactured in 1877 and 1878.