| 摘要 |
<p>PURPOSE:To embody the effectiveness of fire protection, while using an inexpensive piping sleeve of high parts controllability. CONSTITUTION:This cover 20 is used for a piping sleeve having a sleeve body 12 inserted through and laid on a wall body 11, and a pair of flanges 13 and 14 fitted to both sides of the body 12 for clamping the wall body 11. In addition, the cover 20 is used as fixed to the wall body 11 in the state where at least one of the flanges 13 and 14 is concealed.</p> |
