| 摘要 |
The rollers (6) at the top have horizontal axes and run in channel-section parts of the top frame (4), while the bottom guide rollers (7) have vertical axes, and engage guides (8) with downturned flanges (9). There are gaps (10) in the flanges which allow the bottom of the door panel (2) to be swung clear of the bottom guide, and the door may then be lifted off the top support rail. |
