| http://www.w3.org/ns/prov#value | - operatingm'achin` ery. l In the study of the loperation of .mechanism for drying and heating material applicant discovered that greater efhoiency in the heating and drying Vof materials such as sand, stone and other solid materials could be obtained by the 'Withdrawal 'of the moisture as soon after it is converted into vapor, or steam, as possible.
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