该车曾经过一个架修期的运用考核，但由于国家牵引动力政策发生重大变化，未能投入生产。

Although being run for a unwheeling cycle, it could not be put into production for the significant change on the traction power policy of the nation.

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它们的特点是结构简单、阻力系数稳定、密封可靠，基本实现了机车走行一个架修期(至少20万公里)不换修油压减振器的目标。

Thus, the target is basically reached that the locomotive can run without replacement of the oil damper between two unwheeling repairs (at least 200 thousand kilometers running).

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当人类都返回普罗米修斯号后，最后一架航天飞机后将被摧毁，所以没有人能回来。

When the humans are all back on Prometheus the last shuttle will be destroyed so no-one can come back.

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