| 摘要 |
A Window covering for mounting adjacent to a window frame, comprising a fixed upper head box having opposite ends, an operating mechanism housed in the head box, lateral guides each at one of the opposite ends of the head box to coextend with opposite lateral sides of a window frame, a flexible covering member, and a retraction mechanism for the flexible covering member having opposite ends extending between the lateral guides and opposite ends of the retraction mechanism being vertically slidably engaged on the lateral guides for travelling movement therealong,wherein the position of the retraction mechanism along the lateral guides is adjustable.
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