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  <front>
    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-15522</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/15522</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Статьи</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Articles</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">On the issue of determining the useful action of a compressor</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>К вопросу об определении полезного действия компрессора</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Lebedev</surname>
            <given-names>A. A.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Лебедев</surname>
              <given-names>А. А.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Lebedev</surname>
              <given-names>A. A.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru"> (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en"> (Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="1912-12-01">
        <day>01</day>
        <month>12</month>
        <year>1912</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1912</year>
      </pub-date>
      <volume>3</volume>
      <fpage>373</fpage>
      <lpage>377</lpage>
      <history>
        <date date-type="received" iso-8601-date="1912-06-06">
          <day>06</day>
          <month>06</month>
          <year>1912</year>
        </date>
        <date date-type="accepted" iso-8601-date="1912-08-26">
          <day>26</day>
          <month>08</month>
          <year>1912</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1912-12-01">
          <day>01</day>
          <month>12</month>
          <year>1912</year>
        </date>
      </history>
      <permissions>
        <copyright-statement>© A. A. Lebedev</copyright-statement>
        <copyright-year>1912</copyright-year>
        <copyright-holder xml:lang="ru">А. А. Лебедев</copyright-holder>
        <copyright-holder xml:lang="en">A. A. Lebedev</copyright-holder>
        <license xlink:href="http://creativecommons.org/licenses/by/4.0">
          <license-p>CC BY 4.0</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/15522">https://pmi.spmi.ru/pmi/article/view/15522</self-uri>
      <abstract xml:lang="ru">
        <p>До сих пор совершенно не установлено общеприня­того способа определения полезного действия компрессоров и потому сравнение этих машин различных величин и систем между собой по данным их испытаний является весьма затруднительным, т. к. каждый экспериментатор придержи­вается своего метода применения. В дальнейшем автор пытается установить рациональные основания определения полезного действия компрессоров, при которых сpaвнение полученных в отдельных случаях результатов не вызывало бы затруднений.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>Until now, a generally accepted method for determining the useful action of compressors has not been established, and therefore comparison of these machines of different sizes and systems with each other according to their test data is very difficult, since each experimenter adheres to his own method of application. In the future, the author tries to establish rational grounds for determining the useful action of compressors, in which comparison of the results obtained in individual cases would not cause difficulties.</p>
      </abstract>
    </article-meta>
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