| 摘要 |
<p>The tile (1) has tilted plane flanges (3) applied flat against slopes of a roof. The tile is not subjected to stress, and internal angle between the flanges is of specific value, in a free configuration of the tile such that the tile is applied to the roof by deforming its angle without deteriorating or destroying the tile, to a range of ridge angles ranging from 90 to 163 degree. The internal angle lies in a range of about 116 to 96 degree in absence of deformation stress to form flange angle relative to horizontal angle ranging from 42 to 32 degree.</p> |
