| http://www.w3.org/ns/prov#value | - If the amount of the siliceous material which average particle size is not less than 1 ??m and not more than 15 ??m is a little, it does not contribute to the development of strength of the fiber reinforced cement product, whereby the resulting product cannot get necessary strength, whereas if the amount of the siliceous material which average particle size is not less than 1 ??m and not more than
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