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The movement of those who work in confined spaces that look like deep holes by using ropes to rappel themselves into deep holes.
Tower of the penitentiary in the brazilian city. A guard tower on the corner of a prison wall in Brazil
Top view male climbs up the stairs into the tank stainless chemical area inside confined space
Air blowers with proboscis are used to blow air when working in confined space areas
Male worker inspecting belt refractory bricks of coil heater gas equipment of boiler room. Steel structure cleaning and maintenance of industrial steam boilers in dangerous confined spaces.

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