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// draws two walls in parallel, close together so a PCB can fit between } module arrow_indicator() { } $article = $this->alt_textify($article); if (GDORN_DEBUG && $article['debugging']) { foreach ($imgs as $img) { if (anchor_hole=="right" || anchor_hole=="both") { text(string, size, halign=halign, font=font); } module title(string, size=12, halign="center", font=font_for_title) { } module knurled_finish(ord, ird, lf, sh, fn, rn [ ord*cos(lf0), ord*sin(lf0), h0], [ ird*cos(lf0), ird*sin(lf0), h1], [ ird*cos(lf2), ird*sin(lf2), h1], [ ird*cos(lf2), ird*sin(lf2.