n. bentonite
misc. amargosite
... 膨胀地：swelling ground 膨土岩：Bentonite 膨土,皂土(俗)：bentonite ...
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... alveolization 岩石表面凹窝 amargosite 膨土岩 ambonite 堇青安山岩 ...
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长石膨土岩 arkosic bentonite
变膨土岩 metabentonite
钾变膨土岩 K-bentonite
膨润土性页岩 bentonitic shale
膨胀粘土和页岩 Expanded clay and shale
膨土质长石砂岩 bentonitic arkose
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膨土岩遇水会明显膨胀，此性质可理想地保护地层免受钻井泥浆侵害。
Bentonite swells considerably when exposed to water, making it ideal for protecting formations from invasion by drilling fluids.
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