alpine e rock 轻质岗石
The result shows that there are five main ecoregion types in Lhasa area, namely valley agriculture zone, mountain steppe, alpine meadow, snow and ice and rock, and lake.
结果表明，拉萨地区的主要生态环境类型包括河谷农业类型、山地草原类型、高山草甸类型及高山裸岩及冰雪类型。
Filling operations for drains of Ruoergai arctic-alpine wetland have such four types as damming with bag filling with earth and rock, earth and rockfill dam, concrete gravity dam and model dam.
若尔盖高寒湿地排水沟壑填堵分为土石袋筑坝、土石坝、混凝土重力坝和模板坝四种类型。
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