| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce man-hour (time) in accompany with construction by dispensing with works such as confirmation of a thickness dimension of a wall in advance, improving productivity (mass-productivity) by dispensing with individual manufacturing, reducing costs, and improving construction quality and general versatility by being fitted to existing walls of various thicknesses. <P>SOLUTION: A duct body section 2 is configured by combination of an inner duct section 2x and an outer duct section 2y, the duct body section 2 is extensively configured by inserting the inner duct section 2x into the outer duct section 2y, indoor flange sections 3a, 3b or outdoor flange sections 4a, 4b are disposed on one end of the inner duct section 2x, and the other of the inner flange sections 3a, 3b and the outdoor flange sections 4a, 4b are disposed on one end of the outer duct section 2y. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
