| 摘要 |
An adjustable bend (300) comprising a series of inter-engaging rings (302), each ring having a first end portion of a relatively lesser diameter and a second end portion of a relatively greater diameter, the rings (302) being arranged such that, from ring to ring, the first end portion of one ring is slidably received within the second end portion of a successive ring, in such a manner as to allow the successive rings to deviate from a coaxial alignment by asymmetric sliding of the first end portion of one ring within the second end portion of the other ring, the rings being arranged to present a substantially smooth internal surface of the bend. <IMAGE> |
