| http://www.w3.org/ns/prov#value | - d or a collector, which is connected to a set of wellheads, or else part of a fixed installation anchored to the seabed.Two known types of method are used for connecting one end of a subsea riser to a seabed installation, a first type in which said end is guided and connected vertically to the installation, i.e. approximately perpendicular to the surface of the seabed, and a second type in which s
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