| http://www.w3.org/ns/prov#value | - A flexible portion, such as a bellows 86, or an articulated portion, is arranged between the inlet and the outlet of the tube 92 to allow for the adjustment of orientation of its third central axis 94 and, thus, its outlet 93.As will be explained herein below, a hydraulic, pneumatic or other mechanical device is provided to adjust the orientation of the outlet 93 of the third tube.Advantageously,
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