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BackWorking_increment = working_height / (8+tolerance/3); // generally-useful spacing amount for vertical columns of stuff col_left = h_margin; col_right = width_mm - thickness*2; // draw a "vertical" wall // h = shafthole_height, $fn = top_rounding_faces cylinder(h = stem_transition_height, r1 = stem_radius, $fn = smooth } module make_surface(filename, h) { } /* absolute URL is ready! */ return $scheme . '://' . $abs; if (preg_match("@.*(