| 摘要 |
A means for preventing air leakage through the sealing means existing between a pair of relatively movable sash elements in the area where the sealing zone is normally interrupted to permit planar movement of the sash perpendicular to its normal direction of movement to allow removal of the sash relative to a supporting window frame. The novel structure includes a resilient member which is manually shiftable in a direction perpendicular to the plane of the window sash when removal of the sash is desired.
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