Here, extreme temperatures and pressures force lava up through the layers of the Earth in tubes criss-crossing the mantle like a sort of chaotic plumbing for lava.
在地幔的高温和强压作用下，火山岩有如涌入杂乱无序的管道，阡陌纵横于地幔，向上渗入地球各圈层。
The key lies in producing enough great driving force of natural circulation at reasonable heating temperature difference to make masted tape self-rotate reliably in heat transfer tubes.
其关键是能否在合理的加热温差下产生足够大的自然循环推动力，足以带动自动清洗螺旋扭带可靠地自转。
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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