chalky porosity
... chalky clay 白垩质粘土 chalky porosity 白垩状孔隙 chalky 白垩质的 ...
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浅埋藏似能保留具白垩状结构的孔隙。
Shallow burial seems to preserve chalky textured porosity.
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Study on Strata Mechanical Structure and Support Adaptability of Shallow Seam;
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