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    <div class="moz-cite-prefix">Hi Mikhaylov,<br>
      <br>
      Did you try threshold filter? You could set a threshold value to
      extract specific region. Another possibility is to write a
      programmable filter (in Python) to perform more complex
      modifications in the object. I hope it helps.<br>
      <br>
      Regards,<br>
      <br>
      --ufuk<br>
      <br>
      On 04/08/2017 07:32, Сергей Михайлов via ParaView wrote:<br>
    </div>
    <blockquote cite="mid:1501821169.931088454@f175.i.mail.ru"
      type="cite">
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                  <p><span lang="EN-US">Hello</span>!</p>
                  <p><span lang="EN-US">We have the following  3D
                      object:<span style="font-size: 11.0pt;font-family:
                        'Calibri','sans-serif';mso-fareast-font-family:
                        Calibri;mso-fareast-theme-font:
                        minor-latin;mso-bidi-font-family: 'Times New
                        Roman';mso-ansi-language:
                        RU;mso-fareast-language: RU;mso-bidi-language:
                        AR-SA;" data-mce-style="font-size:
                        11.0pt;font-family:
                        'Calibri','sans-serif';mso-fareast-font-family:
                        Calibri;mso-fareast-theme-font:
                        minor-latin;mso-bidi-font-family: 'Times New
                        Roman';mso-ansi-language:
                        RU;mso-fareast-language: RU;mso-bidi-language:
                        AR-SA;"><span style="font-family: arial,
                          helvetica, sans-serif;font-size: 15px;"> <br>
                          <img
                            src="cid:part1.FA775886.D49D91FD@be.itu.edu.tr"
                            alt="" data-mce-src=""
                            data-mce-style="display: none;"><br>
                        </span></span></span></p>
                  <p><span lang="EN-US">I want to  left cylinder in the
                      center of the object and delete another part of
                      the object. The result of such operation is
                      cylinder.</span></p>
                  <p><span lang="EN-US">How can I do it?</span></p>
                  <p><span lang="EN-US"> </span></p>
                  <p><span lang="EN-US"> </span></p>
                  <p><span style="font-size: 10pt;font-family: 'Times
                      New Roman', serif;" data-mce-style="font-size:
                      10pt;font-family: 'Times New Roman', serif;"
                      lang="EN-US">Best regards, Mikhaylov Sergey</span></p>
                  <p><span style="font-size: 10pt;font-family: 'Times
                      New Roman', serif;" data-mce-style="font-size:
                      10pt;font-family: 'Times New Roman', serif;"
                      lang="EN-US">Company JSC</span><span
                      style="font-size: 10pt;font-family: 'Times New
                      Roman', serif;" data-mce-style="font-size:
                      10pt;font-family: 'Times New Roman', serif;"> "</span><span
                      style="font-size: 10pt;font-family: 'Times New
                      Roman', serif;" data-mce-style="font-size:
                      10pt;font-family: 'Times New Roman', serif;"
                      lang="EN-US">RN</span><span style="font-size:
                      10pt;font-family: 'Times New Roman', serif;"
                      data-mce-style="font-size: 10pt;font-family:
                      'Times New Roman', serif;">-</span><span
                      style="font-size: 10pt;font-family: 'Times New
                      Roman', serif;" data-mce-style="font-size:
                      10pt;font-family: 'Times New Roman', serif;"
                      lang="EN-US">UfaNIPIneft</span><span
                      style="font-size: 10pt;font-family: 'Times New
                      Roman', serif;" data-mce-style="font-size:
                      10pt;font-family: 'Times New Roman', serif;">"</span></p>
                  <p><span style="font-size: 10pt;font-family: 'Times
                      New Roman', serif;" data-mce-style="font-size:
                      10pt;font-family: 'Times New Roman', serif;">Tel:
                      (347) 293-60-10 ex. 2734</span></p>
                  <p> </p>
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