water pit meaning in English

水池
水冷坑

Specification for the construction and acceptance of concrete water pit engineering for petrochemical industry
石油化工混凝土水池工程施工及验收规范
The discovered balin stone lies in a shallow earth . most of them are revealed near the ground . there are two major kinds named water pit and mountain pit
已发现的巴林石埋藏较浅，许多为近地表开采。其主要品种也分为冻地石和与山坑石。