| 摘要 |
A manually operated device for raising and lowering shades on glass-enclosed atrium or greenhouse walls which includes a self-leveling feature which corrects for uneven shade position and enables one to operate a shade on an atrium or greenhouse wall without the use of a motor-driven system. Also disclosed is a manually operated device for raising and lowering shades on glass-enclosed atrium or greenhouse walls which may be raised or lowered with one hand grasping a handhold on either side of the shade, making it unnecessary to use both handholds.
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