After the torch left our sight, we had to wait for a little bit - we weren't given the option of following the torch as it went through Lhasa.

火炬从我们视线消失的时候，我们还不能马上走——我们不允许跟随火炬在拉萨传递。

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Due to the technical improvement of several years ago, transportation through Golmud-Lhasa pipeline has undergone the transition from the floating tank process to the tight line process.

格拉管线几年前进行了维持性技术改造，实现了由“旁接罐”流程为主向“泵到泵”密闭流程为主进行顺序输油的转变。

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