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2. Hard hat - Wikipedia

   en.wikipedia.org/wiki/Hard_hat

   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 ...

3. Underground personnel carrier - Wikipedia

   en.wikipedia.org/wiki/Underground_personnel_carrier

   In the coal mining industry low profile personnel carriers are the most commonly used. These carriers may only have a 3 to 3.5 feet (0.91 to 1.07 m) height dimension and carry up to 14 men, and are typically built from the ground up and can be designed with job specific attachments.

4. Underground hard-rock mining - Wikipedia

   en.wikipedia.org/wiki/Underground_hard-rock_mining

   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.

5. 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 subsequently today's mining helmets .

6. Underground soft-rock mining - Wikipedia

   en.wikipedia.org/wiki/Underground_soft-rock_mining

   Underground soft-rock mining is a group of underground mining techniques used to extract coal, oil shale, potash, and other minerals or geological materials from sedimentary ("soft") rocks. [1] Because deposits in sedimentary rocks are commonly layered and relatively less hard, the mining methods used differ from those used to mine deposits in igneous or metamorphic rocks (see underground hard ...

7. MSA Safety - Wikipedia

   en.wikipedia.org/wiki/MSA_Safety

   Best known for its Bakelite Skullgard hard hat, the company’s product line includes gas monitoring and detection instruments, filter-type respirators, gas masks, breathing apparatus used by firefighters, thermal imaging cameras, firefighter helmets, ballistic body armor, military communications systems, a broad range of industrial head and fall protection products, and safety products for Do ...