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Laboratory fill test: fill water content, grain analysis and specific gravity test were tested.
填土的室内试验：填土含水量测定、颗粒分析和比重测定。
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In this paper, the principle and the application of magnetic fluid was studied in the specific gravity test of objects.
本论文研究了磁性液体物体比重测试技术的原理及其应用。
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