Taking the hybrid ground source heat pump with cooling tower as research object, a simplified calculation model of buried tube heat exchanger is established.

以配置冷却塔的复合式土壤源热泵为研究对象，建立了地埋管换热器简化计算模型。

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Construction of various urban underground engineering, deep-buried tube work, large span highway (railway) tunnel are greatly improving tunnel construction technology.

一系列的城市地下工程、深埋管道工程、大跨度公(铁)路隧道的修建，大大促进了隧道施工技术的进步。

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This paper analyzed the energy consumption of a system in operation status——the double U-tubes vertically buried tube ground-source heat pump system in an air force station of Chongqing.

基于重庆市某空军场站的双U管竖埋式土壤源热泵系统工程，对该系统冬季变工况下的运行能耗进行了分析。

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It was a buried metal tube aimed along the irrigation ditch and loaded with explosives, bullets, ball-bearings and spark plugs.

WSJ: When the Fighting Stops: Troops Coming Home from Afghanistan