underclays造句

"underclays"是什么意思   

例句与造句

  1. In addition to underclays, ganisters also occur as seatearths.
  2. Underclays, which occur within Carboniferous coal measures, commonly contain Stigmarian roots.
  3. Just as not all underclays are fireclays, not all fireclays are underclays.
  4. Just as not all underclays are fireclays, not all fireclays are underclays.
  5. Within Carboniferous and other coal bearing strata, fireclay quite commonly comprises many underclays.
  6. It's difficult to find underclays in a sentence. 用underclays造句挺难的
  7. In Great Britain underclays, which are 1 to 3 metres ( 3 to 9 feet ) thick, are major source of commercial fireclay deposits.
  8. Underclays typically show considerable evidence of having been altered by plant activity and illuviated clay pore fillings, different types of pedogenic microfabrics, rhizocretions, caliche nodules, root molds, and soil horizons.
  9. 1935-Petrology of the Pennsylvanian shales and noncalcareous underclays associated with Illinois coals : American Ceramic Society Bulletin, v . 14, p . 113-119, 129, 134, 170-176.

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