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Worker hand holding gas detector inspection safety gas testing at front manhole stainless tank to work inside confined
Occupational health and safety confined spaces permit book placing on the table with defocused supervisor writing job hazard analysis risk assessment with teammate prior starting
A group of cattle nelore in confinement
The inside of the boiler confined space, a yellow ventilator And radio communication To communicate the people inside With the chef system in the confined space.
a ship crew is checking the atmosphere in confined or enclosed space by multi-gas meter before entering

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