According to path analysis upon the invading cold air on surface, the cold air paths causing heavy sand storm processes in Shaanxi are divided into the west, the northwest, and the north way.
根据地面冷空气入侵陕西的路径分析，将造成陕西强沙尘暴天气的冷空气路径分为西路、西北路、北路三条。
On the basis of study and analysis of sand production mechanism in heavy oil reservoir of fault block Wa 82, the strategy of composite treatment is proposed.
在对洼82断块稠油油藏出砂机理研究分析的基础上，提出了综合治理该块出砂问题的策略。
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