Sand production is an important factor, which affects oil well productivity.
出砂是影响油井生产能力的一个重要因素。
The sand stratum in old river bed is important factor affecting stability of dam.
古河道砂层的存在，是影响围坝稳定的主要环境因素。
Sand production is an important factor affecting productivity of oil wells.
油藏开发过程中的出砂问题是影响产能的重要因素。
Carried on the analysis to the lost wax casting craft sand hole defect creation factor.
对熔模铸造砂眼缺陷产生因素进行了分析。
Carried on the analysis to the lost wax casting craft sand hole defect creation factor.
对熔模铸造砂眼缺陷产生因素进行了分析。
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