seam floor in a sentence

"seam floor" in Chinese  
  1. Contour map of seam floor
  2. Technological management of grouting reconstruction of coal seam floor within rich aquifer region
  3. It's difficult to find seam floor in a sentence.

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  1. seam cut in a sentence
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  4. seam fat in a sentence
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  9. seam height in a sentence
  10. seam line in a sentence
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