联盟号飞船用于在地球和轨道之间运输航天员，而且经常保持充足的数量，因此当危险发生时，它们可以作为“救生船”使用。
Soyuz capsules are used to ferry crew to and from the orbiting platform, and enough vehicles are always present so that they can be used as "lifeboats" if an emergency arises.
该术语适用于各种运输方式，但当货物在目的港船上或码头交货时，应使用DES 或DEQ 术语。
The term applies to all modes of transport, but the cargo ship at the port of destination or quay, the DES or DEQ terms should be used.
所建立的优选模型可用于新矿设计时和生产矿改扩建时联合运输系统的优化。
The optimization model established can be used to design new mines and to optimize the combined haulage system of enlargement and reconstruction of operating mines.
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