Portland cement must lie so fine that more than three-fourths of it will pass through a isieve of 40,000 holes nor snnare inch—a sieve so fine that it holds rvater.
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Bibliographic details
Hawera Star, Volume XLVII, 14 April 1928, Page 5
Word Count
30Untitled Hawera Star, Volume XLVII, 14 April 1928, Page 5
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