海砂 [ㄏㄞˇ ㄕㄚ; hai3 sha1]
  sea sand (sand collected from the ocean floor, as opposed to that which is used as an ingredient in concrete)
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  海砂
  かいさ
  noun (common) (futsuumeishi)
  sea sand (sand collected from the ocean floor, as opposed to that which is used as an ingredient in concrete)
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