| 摘要 |
The window frame has, inside the lower horizontal frame, a tube (124) containing a single electric motor with shafts extending from each end of its rotor to drive gearboxes (128,130) at each end of the frame. The gearboxes contain a worm and pinion gear, and the pinion displaces an arm (136,138) that is attached to the inside of the shutter (116,118) to open or close the shutter. |
