An analysis is made on the influence of low temperature environment on the property of natural gas spherical tank used in the frigid region.
分析了寒冷地区的低温环境对天然气压力球罐性能的影响。
The asphalt pavement performances, especially low temperature performances were modified in order to offer solutions for temperature cracking of asphalt pavement in frigid region.
以期改善沥青路面性能，尤其是低温抗裂性，为寒冷地区的沥青路面温度裂缝问题提供解决途径。
The paper introduces quality control technologies for concreting work, curing of beams, stretching and pressure grouting in the course of bridge precasting in the frigid plateau region.
介绍了高原高寒地区预制桥梁施工过程中混凝土施工、梁体养护、张拉压浆等的质量控制技术。
The climate in upper dam region of Chengde prefecture is that of frigid temperate zone, semi damp grass land and monsoon.
承德坝上地区，属寒温带半湿润草原季风气候，森林草原生态系统脆弱，自我恢复能力较差。
The climate in upper dam region of Chengde prefecture is that of frigid temperate zone, semi damp grass land and monsoon.
承德坝上地区，属寒温带半湿润草原季风气候，森林草原生态系统脆弱，自我恢复能力较差。
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