采用铅硼硅熔决釉研制出同时符合普通粘土瓦坯的烧成温度低、热膨胀系数低这两个主要性能特点的釉料。
The color glaze of low firing temperature and low expansion coefficient, to match the glaze tile made from common clay, was prepared in lead borosilicate system.
分析认为，膨胀性粘土的存在是影响低渗透油藏渗流特性的关键因素；
The study shows that the swelling clay is the key factor that affects considerably the percolation feature of low permeability reservoir.
由于软岩为强度低、孔隙度大、胶结程度差、含有大量膨胀性粘土矿物的松散、软弱岩层。
Because soft rocks have low strength and high porosity and contain large amount of expansive clay minerals, the freezing-thawing process of soft rock is complicated.
由于软岩为强度低、孔隙度大、胶结程度差、含有大量膨胀性粘土矿物的松散、软弱岩层。
Because soft rocks have low strength and high porosity and contain large amount of expansive clay minerals, the freezing-thawing process of soft rock is complicated.
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