air supply hose industry job when open manhole work confined space area |
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| navigate by keyword : abstract air aircraft airport area background black cement circular city clean condition conduit cone confined construction danger detail for ground hole hose industrial industry install irrigate job lines maintenance manhole nozzle open outdoor outdoors outside parallel pattern pipe plastic pour repair round rows rule safe safety sanitary service should space street supply support tubes underground urban utility wash water when white with work worker yellow |
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| Air supply hose in industry job when open manhole or work in confined space area should be install supply hose for support worker, Safety rule when work with confined space area. |
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