The  clever solution they used was to freeze the oil using liquid nitrogen, which is usually around  -200C or -320F, creating solid plugs on either end of the section to be repaired.

他们使用的巧妙解决方案是使用液氮冷冻油，液氮通常在 -200C 或 -320F 左右，在待修复部分的两端形成固体堵塞物。