... 变相开关 change switch 应变相 strain facies 启示录变相 Apocalypsis cum Figuris ...
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Red sand stone is low or medium rock strain in strength, variable and complicated in litho - facies, and easily weathered or weakened.
红砂岩为中低强度岩层、岩相复杂多变,较易风化、软化。
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