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Calcium In Natural Quarry Sand

Calcium In Natural Quarry Sand

Stone was a high-calcium variety obtained from a local quarry. The sand used was of natural origin. The sawdust was pro duced from walnut poplar and cherry cuttings. After being screened of all materials not passing a 12-in. sieve the abrasives were screened by using the following sieve sies 3s in.

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Calcium In Natural Quarry Sand