| 摘要 |
<p>The thermal insulating and weather proofing cladding panel has a staircase of two equal risers and three unequal steps. The first or interior step is the shortest then the middle step while the exterior step is the longest and is fair faced by scratching to imitate brickwork, or is sand or gravel covered, or is rusticated by rolling. Successive panels are displaced by one step so that the middle and top step of the upper panel bear on the lower and middle step respectively of the bottom panel.</p> |
