A pile of sand is loose, but it and cement, gravel, water mixture, than the granite also tough.
一堆沙子是松散的，可是它和水泥、石子、水混合后，比花岗岩还坚韧。
This paper discusses the method for cutting cementing and flushing core samples from a loose oil-bearing sandstone reservoir, and the formulation of an inorganic cement.
本文论述了疏松含油砂岩渗透率柱塞的钻切、胶结、洗油和无机粘合剂的配制方法，并应用新方法对松辽盆地北部疏松含油砂岩进行了分析与对比。
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