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Construction worker wearing an MSA Skullgard hard hat at Douglas Dam, Tennessee (), 1942. Mine Safety Appliances, or MSA Safety Incorporated, is an American manufacturer and supplier of safety equipment designed for use in a variety of hazardous conditions in industries such as construction, the military, fire service, and chemical, oil, and gas production.
Hard hat. A hard hat is a type of helmet predominantly used in workplace environments such as industrial or construction sites to protect the head from injury due to falling objects, impact with other objects, debris, rain, and electric shock. Suspension bands inside the helmet spread the helmet's weight and the force of any impact over the top ...
The original American fire helmet was created by a New York City luggage maker who was also a volunteer fireman in the 1830s, seeking a better design more tailored to the unique requirements for firefighting than the "stovepipe" "helmets" then in use. Stovepipe was essentially a top hat made of stiff leather with painted design to identify fire ...
The Advanced Combat Helmet ( ACH) is the United States Army 's current combat helmet, used since the early 2000s. It was developed by the United States Army Soldier Systems Center, [ 2] the U.S. Army Special Operations Command, [ 3] and the U.S. Army Research Laboratory [ 4] to be the next generation of protective combat helmets for use by the ...
The Hard Hat Riot occurred in New York City on May 8, 1970, when around 400 construction workers and around 800 office workers attacked around 1,000 demonstrators affiliated with the student strike of 1970. The students were protesting the May 4 Kent State shootings and the Vietnam War, following the April 30 announcement by President Richard ...
A professional doctoral degree for naturopathic practitioners in the United States. Holders of the ND or NMD degree are known as naturopathic physicians in states where they may be licensed. The designation NMD is used in Arizona. Doctor of Business Administration. DBA or DrBA. Doctor of Education. EdD or DEd.
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