<p><a href="https://cadbull.com/?door-elevation-and-section-plan-layout-file">Ventilation </a>and <a href="https://cadbull.com/?structural-construction-drawing-detail">construction drawing</a> in dwg file. detail drawing of ventilation plan , different types of ventilation ,v1,v2, v3 , door and window construction section with descriptions and etc details.</p>