| 摘要 |
<p>The shell has two side plates (1, 2) connected with one another by curved flat steel bar frames, and connecting units attached to a brick-work. A u-shaped metal clamp along with its free side ends are inserted into one of cavities that are formed through shafts of the connecting units. Reinforcing bar spacers are provided between the connecting units and are projected in the free sides of the shell.</p> |
