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2. Miner's cap - Wikipedia

   en.wikipedia.org/wiki/Miner's_cap

   The miner's cap ( German: Fahrhaube) is part of the traditional miner's costume. It consists of a white material (linen) and served in the Middle Ages to protect the miner when descending below ground ( unter Tage ). Later it was replaced by the miner's hat ( Fahrhut or Schachthut ), from which the leather cap or helmet were developed and ...

3. MSA Safety - Wikipedia

   en.wikipedia.org/wiki/MSA_Safety

   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.

4. Hard hat - Wikipedia

   en.wikipedia.org/wiki/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 of the head.

5. List of How It's Made episodes - Wikipedia

   en.wikipedia.org/wiki/List_of_How_It's_Made_episodes

   List of. How It's Made. episodes. How It's Made is a documentary television series that premiered on January 6, 2001, on the Discovery Channel in Canada and Science in the United States. The program is produced in the Canadian province of Quebec by Productions MAJ, Inc. and Productions MAJ 2. In the United Kingdom, it is broadcast on Discovery ...

6. Caterpillar Inc. - Wikipedia

   en.wikipedia.org/wiki/Caterpillar_Inc.

   Caterpillar Inc. Caterpillar Inc., also known as Cat, is an American construction, mining and other engineering equipment manufacturer. [ 6] The company is the world's largest manufacturer of construction equipment. [ 3][ 7][ 8] In 2018, Caterpillar was ranked number 73 on the Fortune 500 list [ 9] and number 265 on the Global Fortune 500 list ...

7. Underground hard-rock mining - Wikipedia

   en.wikipedia.org/wiki/Underground_hard-rock_mining

   A 3D diagram of a modern underground mine with shaft access. Underground hard-rock mining refers to various underground mining techniques used to excavate "hard" minerals, usually those containing metals, [ 1] such as ore containing gold, silver, iron, copper, zinc, nickel, tin, and lead. It also involves the same techniques used to excavate ...