| 摘要 |
1. Infrared heated tunnel consisting of a tube frame (1) with rectangular cells closed by closing panels (3, 4, 5, 13), characterized in that said vertical panels (5) are separated into two groups, one interior (6) and on exterior (7) group, which are mounted from inside or outside of the tunnel respectively, every one of said groups consisting of rectangular panels of folded sheet metal with drooping edges, two parallel edges (8, 24, 27) of which being larger than the others and ending a V profile (9, 9a, 9b) permitting the respective panel to be fitted onto two parallel tubes (10 ; 12) of the rectangular cell, one of said panels (6, 6a ; 7, 7a) being fitted onto the vertical tubes (12) of said frame and the other of said panels (7, 7a ; 6, 6a) being fitted onto the tubes of the same cell perpendicular to them. |
