| 摘要 |
<p>A ground shaft (10) forms the installation and distribution void for dwelling utilities e.g. gas, electricity, water, drains, telephone and cables. The shaft consists essentially of four plumb vertical sidewalls (34) which in horizontal cross section embrace a right-angled area. The sidewalls are shuttering panels of e.g. concrete, plastic, sheet metal, corrugated metal or similar.</p> |
