two professional engineer man and women working checking maintenance pipeline construction top the building worker |
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| navigate by keyword : background black building business checking construction control employee employment energy engineer engineering engineers equipment factory female hard hardhat hat helmet industry inspector job maintenance manufacturing mechanic men off people person pipe pipeline pipelines production professional pump safety site staff structure supply system technician technology tube turn valve women work worker workplace young |
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| Two Professional engineer men and women working checking and maintenance pipeline construction top of the building. Worker in safety uniform using tablet at pipeline construction system |
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