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2. Confined space - Wikipedia

   en.wikipedia.org/wiki/Confined_space

   A confined space is a space with limited entry and egress and not suitable for human inhabitants. Alternative names for a confined space are enclosed space and dangerous space. [1] An example is the interior of a storage tank, occasionally entered by maintenance workers but not intended for human occupancy.

3. Underground personnel carrier - Wikipedia

   en.wikipedia.org/wiki/Underground_personnel_carrier

   Mantrips usually take the form of a train, running on a mine railway and operating like a cable car. Mantrips may also be self-powered, for example by a diesel locomotive. Other types of mantrips do not require a track and take the form of a pickup truck running on rubber tires. Because many mines have low ceilings, mantrips tend to have a ...

4. Immediately dangerous to life or health - Wikipedia

   en.wikipedia.org/wiki/Immediately_dangerous_to...

   Examples include high altitudes and unventilated, confined spaces. The OSHA definition is arguably broad enough to include oxygen-deficient circumstances in the absence of "airborne contaminants", as well as many other chemical, thermal, or pneumatic hazards to life or health (e.g., pure helium, super-cooled or super-heated air, hyperbaric or ...

5. Permit-to-work - Wikipedia

   en.wikipedia.org/wiki/Permit-to-work

   A permit to work form typically contains these items: [5] The work to be done, the equipment to be used and the personnel involved. Precautions to be taken when performing the task. Other workgroups to be informed of work being performed in their area. Authorisation for work to commence. Duration that the permit is valid.

6. Confined space rescue - Wikipedia

   en.wikipedia.org/wiki/Confined_space_rescue

   Confined space rescue is a subset of technical rescue operations that involves the rescue and recovery of victims trapped in a confined space or in a place only accessible through confined spaces, such as underground vaults, storage silos, storage tanks, or sewers. A warning label on a storage tank, indicating that it is a confined space.

7. Asphyxiant gas - Wikipedia

   en.wikipedia.org/wiki/Asphyxiant_gas

   Confined spaces, combined with accidental gas leaks, such as mines, [1] submarines, [2] [3] refrigerators, [4] or other confined spaces [5] Fire extinguisher systems that flood spaces with inert gases , such as computer data centers and sealed vaults [ 4 ]