Planning sand extraction scheme in accordance with potential channel change and combining channel modification with sand extraction can improve navigation condition to a certain extent.
科学合理规划采砂方案，顺应河床演变趋势，将整治河道与采砂疏浚河道有机地结合起来，可除害兴利，在一定时期内和一定程度上改善航道条件。
An LCA tracks, say, a glass jar from the initial extraction of the silica from sand through the 48 hours of cooking at 2, 000 degrees Fahrenheit all the way through its final disposal.
例如，运用LCA技术，可以对一只玻璃瓶的整个生产及使用过程进行追踪，即从其在华氏2000度高温下熔砂48小时提取硅，直至玻璃瓶被用过之后的最后丢弃的全部过程。
The method of determining the mineral oil content in the oil sand with weight was recommended. As two committed steps, extraction and separation of mineral oil were discussed.
介绍了用重量法测定油砂中矿物油含量的方法，并且对测定的两个关键步骤即油砂中油的萃取以及矿物油的分离进行了重点讨论。
The inference can be proved by the artificial oil mixing test and oil-bearing sand serial extraction.
通过原油混合试验和油砂连续抽提试验证实了混源油的推测。
At present, the commercial method to extract bitumen from oil sand is Hot Water Extraction Process.
目前国外商业上使用的油砂沥青分离方法是水洗分离。
With renewable technologies, on the one hand we do not need a lot of sand, stone, asphalt and other raw materials extraction from nature;
采用再生技术，一方面我们不需要从自然界开采大量的砂、石、沥青等原材料；
Products used for the prevention or control of slime growth on materials, equipment and structures, used in industrial processes, e. g. on wood and paper pulp, porous sand strata in oil extraction.
用于防止或控制在用于工业过程中的材料、设备、结构表面粘液菌的生长。
Besides the storm tide impact, the main causes for coastal erosion are due to the continued decrease of material supply and manual extraction of sand and gravel.
海岸侵蚀的原因除风暴潮影响外，主要是海岸带物质补给来源持续减少和人工采挖砂石。
Besides the storm tide impact, the main causes for coastal erosion are due to the continued decrease of material supply and manual extraction of sand and gravel.
海岸侵蚀的原因除风暴潮影响外，主要是海岸带物质补给来源持续减少和人工采挖砂石。
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