We have referred to the research results, independently developed"the TLD-70 soil freezing experiment box".

本文参考了已有的研究成果，自主开发了“TLD-70土壤冷冻试验箱”。

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A device for drop-freezing experiment was improved, which consists of the cold-cavity, thermometer, controller of temperature, recorder of signals, cold sink, and environment box.

介绍一个改进的水滴冻结实验装置，它由冷腔、冷腔温度控制、水滴冻结信号检测及记录、循环散热和冷环境箱等几部分构成。

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The bonnet and packing box of low temperature service instrument in-line valves shall be extended bonnet type or heat traced, if necessary, to avoid freezing of valve stems.

低温设备仪表在线阀门的阀帽和填料箱应为加长阀帽型或伴热型(必要时)，从而避免阀杆结冰。

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