| 摘要 |
A pipeline apparatus for liquid cryogen includes a first assembly consisting of a first pipe having a first exterior surface and a first passageway for liquid cryogen, and a longitudinal member extending along a portion of the first exterior surface of the first pipe; a second pipe having a second passageway sized and shaped to receive the first assembly therein, the second pipe coacting with the longitudinal member to provide a pair of channels in the second passageway; and a third pipe having a third passageway sized and shaped to receive the second pipe therein, the third pipe spaced apart from the second pipe. |
