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Blower with ducting blowing air into confined space manhole of tank. Safety equipment and one of the procedure of confined space entry.
Male workers working in confined spaces.
Top view male climb up the stairs into the tank stainless chemical area confined space safety blower fresh air
Work area without enough air, pre-aeration, aeration fan (Working in confined spaces)
Metal plate structure of service manhole cover of refinery separator process tank with safety warning sign "confine space entry". Close-up and selective focus.

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