<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:xhtml="http://www.w3.org/1999/xhtml">

  <!-- English (default) -->
  <url>
    <loc>https://pcblib.org/</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
    <xhtml:link rel="alternate" hreflang="en" href="https://pcblib.org/"/>
    <xhtml:link rel="alternate" hreflang="zh" href="https://pcblib.org/?lang=zh"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://pcblib.org/?lang=ja"/>
    <xhtml:link rel="alternate" hreflang="ko" href="https://pcblib.org/?lang=ko"/>
    <xhtml:link rel="alternate" hreflang="es" href="https://pcblib.org/?lang=es"/>
    <xhtml:link rel="alternate" hreflang="fr" href="https://pcblib.org/?lang=fr"/>
    <xhtml:link rel="alternate" hreflang="de" href="https://pcblib.org/?lang=de"/>
    <xhtml:link rel="alternate" hreflang="pt" href="https://pcblib.org/?lang=pt"/>
    <xhtml:link rel="alternate" hreflang="ru" href="https://pcblib.org/?lang=ru"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://pcblib.org/"/>
  </url>

  <!-- Chinese -->
  <url>
    <loc>https://pcblib.org/?lang=zh</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="en" href="https://pcblib.org/"/>
    <xhtml:link rel="alternate" hreflang="zh" href="https://pcblib.org/?lang=zh"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://pcblib.org/?lang=ja"/>
    <xhtml:link rel="alternate" hreflang="ko" href="https://pcblib.org/?lang=ko"/>
    <xhtml:link rel="alternate" hreflang="es" href="https://pcblib.org/?lang=es"/>
    <xhtml:link rel="alternate" hreflang="fr" href="https://pcblib.org/?lang=fr"/>
    <xhtml:link rel="alternate" hreflang="de" href="https://pcblib.org/?lang=de"/>
    <xhtml:link rel="alternate" hreflang="pt" href="https://pcblib.org/?lang=pt"/>
    <xhtml:link rel="alternate" hreflang="ru" href="https://pcblib.org/?lang=ru"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://pcblib.org/"/>
  </url>

  <!-- Japanese -->
  <url>
    <loc>https://pcblib.org/?lang=ja</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="en" href="https://pcblib.org/"/>
    <xhtml:link rel="alternate" hreflang="zh" href="https://pcblib.org/?lang=zh"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://pcblib.org/?lang=ja"/>
    <xhtml:link rel="alternate" hreflang="ko" href="https://pcblib.org/?lang=ko"/>
    <xhtml:link rel="alternate" hreflang="es" href="https://pcblib.org/?lang=es"/>
    <xhtml:link rel="alternate" hreflang="fr" href="https://pcblib.org/?lang=fr"/>
    <xhtml:link rel="alternate" hreflang="de" href="https://pcblib.org/?lang=de"/>
    <xhtml:link rel="alternate" hreflang="pt" href="https://pcblib.org/?lang=pt"/>
    <xhtml:link rel="alternate" hreflang="ru" href="https://pcblib.org/?lang=ru"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://pcblib.org/"/>
  </url>

  <!-- Korean -->
  <url>
    <loc>https://pcblib.org/?lang=ko</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="en" href="https://pcblib.org/"/>
    <xhtml:link rel="alternate" hreflang="zh" href="https://pcblib.org/?lang=zh"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://pcblib.org/?lang=ja"/>
    <xhtml:link rel="alternate" hreflang="ko" href="https://pcblib.org/?lang=ko"/>
    <xhtml:link rel="alternate" hreflang="es" href="https://pcblib.org/?lang=es"/>
    <xhtml:link rel="alternate" hreflang="fr" href="https://pcblib.org/?lang=fr"/>
    <xhtml:link rel="alternate" hreflang="de" href="https://pcblib.org/?lang=de"/>
    <xhtml:link rel="alternate" hreflang="pt" href="https://pcblib.org/?lang=pt"/>
    <xhtml:link rel="alternate" hreflang="ru" href="https://pcblib.org/?lang=ru"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://pcblib.org/"/>
  </url>

  <!-- Spanish -->
  <url>
    <loc>https://pcblib.org/?lang=es</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="en" href="https://pcblib.org/"/>
    <xhtml:link rel="alternate" hreflang="zh" href="https://pcblib.org/?lang=zh"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://pcblib.org/?lang=ja"/>
    <xhtml:link rel="alternate" hreflang="ko" href="https://pcblib.org/?lang=ko"/>
    <xhtml:link rel="alternate" hreflang="es" href="https://pcblib.org/?lang=es"/>
    <xhtml:link rel="alternate" hreflang="fr" href="https://pcblib.org/?lang=fr"/>
    <xhtml:link rel="alternate" hreflang="de" href="https://pcblib.org/?lang=de"/>
    <xhtml:link rel="alternate" hreflang="pt" href="https://pcblib.org/?lang=pt"/>
    <xhtml:link rel="alternate" hreflang="ru" href="https://pcblib.org/?lang=ru"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://pcblib.org/"/>
  </url>

  <!-- French -->
  <url>
    <loc>https://pcblib.org/?lang=fr</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="en" href="https://pcblib.org/"/>
    <xhtml:link rel="alternate" hreflang="zh" href="https://pcblib.org/?lang=zh"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://pcblib.org/?lang=ja"/>
    <xhtml:link rel="alternate" hreflang="ko" href="https://pcblib.org/?lang=ko"/>
    <xhtml:link rel="alternate" hreflang="es" href="https://pcblib.org/?lang=es"/>
    <xhtml:link rel="alternate" hreflang="fr" href="https://pcblib.org/?lang=fr"/>
    <xhtml:link rel="alternate" hreflang="de" href="https://pcblib.org/?lang=de"/>
    <xhtml:link rel="alternate" hreflang="pt" href="https://pcblib.org/?lang=pt"/>
    <xhtml:link rel="alternate" hreflang="ru" href="https://pcblib.org/?lang=ru"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://pcblib.org/"/>
  </url>

  <!-- German -->
  <url>
    <loc>https://pcblib.org/?lang=de</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="en" href="https://pcblib.org/"/>
    <xhtml:link rel="alternate" hreflang="zh" href="https://pcblib.org/?lang=zh"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://pcblib.org/?lang=ja"/>
    <xhtml:link rel="alternate" hreflang="ko" href="https://pcblib.org/?lang=ko"/>
    <xhtml:link rel="alternate" hreflang="es" href="https://pcblib.org/?lang=es"/>
    <xhtml:link rel="alternate" hreflang="fr" href="https://pcblib.org/?lang=fr"/>
    <xhtml:link rel="alternate" hreflang="de" href="https://pcblib.org/?lang=de"/>
    <xhtml:link rel="alternate" hreflang="pt" href="https://pcblib.org/?lang=pt"/>
    <xhtml:link rel="alternate" hreflang="ru" href="https://pcblib.org/?lang=ru"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://pcblib.org/"/>
  </url>

  <!-- Portuguese -->
  <url>
    <loc>https://pcblib.org/?lang=pt</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="en" href="https://pcblib.org/"/>
    <xhtml:link rel="alternate" hreflang="zh" href="https://pcblib.org/?lang=zh"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://pcblib.org/?lang=ja"/>
    <xhtml:link rel="alternate" hreflang="ko" href="https://pcblib.org/?lang=ko"/>
    <xhtml:link rel="alternate" hreflang="es" href="https://pcblib.org/?lang=es"/>
    <xhtml:link rel="alternate" hreflang="fr" href="https://pcblib.org/?lang=fr"/>
    <xhtml:link rel="alternate" hreflang="de" href="https://pcblib.org/?lang=de"/>
    <xhtml:link rel="alternate" hreflang="pt" href="https://pcblib.org/?lang=pt"/>
    <xhtml:link rel="alternate" hreflang="ru" href="https://pcblib.org/?lang=ru"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://pcblib.org/"/>
  </url>

  <!-- Russian -->
  <url>
    <loc>https://pcblib.org/?lang=ru</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="en" href="https://pcblib.org/"/>
    <xhtml:link rel="alternate" hreflang="zh" href="https://pcblib.org/?lang=zh"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://pcblib.org/?lang=ja"/>
    <xhtml:link rel="alternate" hreflang="ko" href="https://pcblib.org/?lang=ko"/>
    <xhtml:link rel="alternate" hreflang="es" href="https://pcblib.org/?lang=es"/>
    <xhtml:link rel="alternate" hreflang="fr" href="https://pcblib.org/?lang=fr"/>
    <xhtml:link rel="alternate" hreflang="de" href="https://pcblib.org/?lang=de"/>
    <xhtml:link rel="alternate" hreflang="pt" href="https://pcblib.org/?lang=pt"/>
    <xhtml:link rel="alternate" hreflang="ru" href="https://pcblib.org/?lang=ru"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://pcblib.org/"/>
  </url>

  <!-- Country-specific landing pages (high-value search targets) -->
  <url>
    <loc>https://pcblib.org/?country=China</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=United+States</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=India</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Germany</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=United+Kingdom</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Japan</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=South+Korea</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Taiwan</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Canada</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=France</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>

  <!-- Technology-specific landing pages -->
  <url>
    <loc>https://pcblib.org/?tech=Rigid</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?tech=Flexible</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?tech=HDI</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?tech=Metal+Core</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?tech=Rogers</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>

  <!-- Additional high-value country pages -->
  <url>
    <loc>https://pcblib.org/?country=Australia</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Brazil</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Mexico</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Italy</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Netherlands</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Singapore</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Thailand</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Vietnam</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Indonesia</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Malaysia</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Israel</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Turkey</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Poland</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Czech+Republic</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Sweden</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Switzerland</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://pcblib.org/?country=Spain</loc>
    <lastmod>2026-08-29</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
  </url>

</urlset>
