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Male worker grinding on steel plate with flash of sparks close up wear protective gloves oil inside confined spaces.
Welding male worker metal is part of machinery plate tank beam pipe construction flash spark inside confined spaces.
Welding male worker metal is part of machinery plate tank beam pipe construction flash spark inside confined spaces.
Employees inspect by taking photographs of internal pressure tanks in confined spaces.
Warning danger confinden space sign. Confinden space authorized personell only. Vector isolated on white background

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