| 摘要 |
<p>FLEXIBLE COLLAR TEE. A recoverable sheet material can be provided with a first portion and a second portion having a series of pleats which accommodate an increasing extent of expansion. The sheet A can be wrapped-around to form a branch-off conduit from a main conduit. The pleated region splays out to form an overlap over a hole in the main conduit. The sheet can be provided with a double pleated region to provide a pipe bend. (Figure 1)</p> |
