said steel pipeline having a predetermined average outside diameter and extending in a first J curve from substantially said platform to the seafloor, along said sea floor, and in a second J curve from said seafloor to said buoy, with said steel pipeline being free of {HEAD ~ attachment} to {TAIL ~ the seafloor} in its extension between said J curves 
said steel pipeline having a predetermined average outside diameter and extending in a first J curve from substantially said platform to the seafloor , along said sea floor , and in a second J curve from said seafloor to said buoy , with said steel pipeline being free of { HEAD ~ attachment } to { TAIL ~ the seafloor } in its extension between said J curves
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