manual valve oil and gas production process open close function worker operator |
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| navigate by keyword : and basic blue close conduit construction control detail device energy engineering faucet fitting fossil fuel function gas generation ground hand handle industrial industry iron line manual metallic object oil open operator pipe pipeline power pressure process production pump raw regulator rig safe station steel stress supply system tap transfer transmission transportation valve water wellhead wheel worker |
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| Manual valve in oil and gas production process, Open and close function by worker or operator. |
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