| 摘要 |
The present invention relates to an operation frame. While a polyamide insulation material is excluded, multiple resin insulation materials with internal spaces are movably arranged between an inner operation frame and an outer insulation frame in a longitudinal direction for thermal insulation. At the same time, both ends of vertical and horizontal sides of the inner operation frame and the outer operation frame made of materials having thermal expansion coefficients from that of the resin insulation material face each other while having a tilted slope to cope with the thermal deformation of the horizontal and vertical sides in the longitudinal direction. |
