Due to the special natural and geographical environment and line conditions, some stricter requirements for the train braking system are needed to ensure the safe train operation.
由于青藏铁路特殊的自然地理环境和线路条件，为保证列车安全运行，对列车制动系统必须有更高的要求。
This paper makes a systematic analysis of the ability to resist drought, flood and waterlogging which are natural calamities of the physical geographical system in Sichuan Basin.
本文对四川盆地自然地理系统抗御干旱、洪涝等自然灾害的能力，作了系统分析。
The geographical position, lake basin shape, features of watershed system, and natural general conditions about Mahu lake are detailed in this paper.
详细阐述了马湖的地理位置、湖盆形态、流域水系特征及湖区自然概况。
The geographical position, lake basin shape, features of watershed system, and natural general conditions about Mahu lake are detailed in this paper.
详细阐述了马湖的地理位置、湖盆形态、流域水系特征及湖区自然概况。
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